The Deeper You Go, the Faster It Gets — Survival Strategy by Section

Mocha speeds up the deeper she goes.
You start at 12 meters per second, and as the depth grows she keeps accelerating, all the way up to 30 meters per second.
Top speed arrives around the 1,500m mark.
Even in the same burrow, the 100m mark and the 1,000m mark are essentially different games.

Faster means less time

Why the speed increase matters so much becomes clear when you think in reaction time.
The distance at which obstacles become visible stays roughly constant because of the fog, but crossing that distance at 12 m/s versus 30 m/s differs by a factor of 2.5.
"There's a rock ahead" gives you less than half the thinking time late in a run that it gave you early.

So surviving the deep sections isn't about faster hands.
It's about seeing sooner.

Handling each obstacle

Rocks are the biggest and simplest.
Go around them left or right.
Their hitbox is on the large side, so trying to shave past one is an easy way to get clipped — give them room.

Roots are arcs across the tunnel's circumference, so you can't go around them sideways.
You jump them instead.
The clearance sits well below a normal jump's apex, so any reasonable timing clears it comfortably.
You don't need precision, just the habit of pressing before you arrive.

Moles show up in the deeper sections.
They drift slowly back and forth along the wall while popping in and out.
Since they're a moving target, dodge based on where they're heading, not where they are right now.

Meteors are exclusive to the Moonlit Burrow, and they sweep across the ring quickly in one direction.
They're much faster than moles, so don't try to half-follow them — commit to dropping behind or crossing well ahead.

One thing you can relax about: obstacles within a section are guaranteed a minimum spacing, so you'll never face a solid wall of them with no way through.
There is always a path.

Playing each section

Early (0–300m) is relaxed.
The pace is slow, so you have plenty of time to react — this is when you want to stack up a long combo and lay the foundation for your score.
Rather than forcing risky dodges, calmly follow the carrot lines.
Losing a heart here is especially wasteful: you're trading a life you'll need deep down for a few carrots near the surface.

Mid (300–800m) is where the speed starts picking up.
From around here, the key is keeping your eyes on the far inner part of the screen rather than right at your feet.
The sooner you spot an obstacle, the sooner you can react.
Jump over roots, and weave left or right around rocks.

Late (800m onward) is nearly at peak speed.
You only have three hearts, and a hit gives you 1.5 seconds of invincibility — but take a few in a row and it's over in a flash.
If you see a pocket watch, don't hoard it; using it in this stretch is where it pays off most.
Instead of getting greedy for every carrot, put your weight on staying alive.

Two ways out of trouble

Picking up a shield blocks one hit.
Grabbing one before you head into the deep section is effectively an extra heart.

The booster works differently.
It accelerates you hard for a short window, and you're invincible the whole time.
So taking one right before a rough stretch lets you barrel straight through it.
It looks dangerous because you're moving faster, but those are the safest few seconds in the run.

Fog sets your reaction time

"See it sooner" has a hard ceiling.
The burrow is filled with fog that hides everything completely past 90m.
However good your eyes are, there is nothing to see beyond that.

So reaction time is purely a function of speed.

In practice something just emerging from the fog is barely a shape, so your real decision window is shorter than the table says.
Late in a run, assume you have a bit over two seconds between seeing and deciding.

Which means what the late game needs isn't faster hands — it's fewer decisions.
Know which way you'll go around a rock before you see one; when a root appears, the only open question should be when to press.
Starting to think from scratch at the moment it appears is already too late.

Nothing ever walls you in

One rule you can rely on: within a stretch, obstacles are placed at least 6m apart along the depth axis.
Two of them sitting at exactly the same depth and blocking the lane cannot happen by construction.

That doesn't make 6m generous.
At the speed cap, 6m is 0.2 seconds.
It means two obstacles in sequence each need handling, with two tenths of a second between them.
So "there's always a way through" is true — but you have to have found the way before you get there.

Practically, when you pick a side to dodge the first obstacle, you have to have seen what's behind it.
Cutting right past the first one only to find the second one on the right leaves you no time to come back.

Three ways hearts get lost

Look at enough runs and nearly every crash is one of these.

Reversing. You commit one way, realize late that the other side was safer, and turn back.
There's a cap on how fast you rotate around the wall, so changing direction twice is usually too slow.
Commit and stay committed.

Following carrots into it. Focusing on a combo locks your eyes onto the carrot line, and you see the obstacle sitting on that line late.
Keep carrots in the lower part of your vision and your focus on the direction of travel.

Wasting the invulnerability. A hit grants 1.5 seconds of invulnerability, and it exists so you can reposition.
What usually happens instead is that you keep running in a panic and take the second hit the moment it expires.
Spend that 1.5 seconds moving somewhere safe.

A checklist by depth

0–300m — protect hearts.
Build combos, but abandon dangerous carrots.
Hearts lost here are the most expensive ones.

300–800m — push your focus further ahead.
Don't bend your route for a pocket watch, but take one that's close.

800–1,500m — near top speed.
Bank a shield and spend the watch in front of a rough stretch.
Survival outranks combo.

1,500m+ — speed stops climbing.
From here it's pure concentration, and depth pays every 3.3 seconds per 100m.
Thirty more seconds here is worth more than the minute that came before it.

Next up: Pushing a single run's score higher →