Which hole should the rock cover?

Drag the gray rock onto the hole on the right side of the play area.

Where should I put the tortoise?

After the right hole is blocked, drag the upside-down tortoise into the open hole at the lower-left.

The mole uses the open tunnel to reach the tortoise; wait for it to reappear upright.

The upside-down orientation lets it slide through the unblocked hole. The mole on the other side flips it right-side up.

Brain Test 4 level guide

medium 5 colors

Brain Test 4 Level 127 blocks one hole with the rock, puts the upside-down tortoise through the other, and lets the mole turn it over.

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Press and hold the gray rock above the right-hand hole.
Drag the rock down onto the right-hand hole and release it so that tunnel is covered.
Press and hold the upside-down green tortoise at the lower-left.
Drag the tortoise into the open left-hand hole and release it.
Wait for the mole to move through the tunnel and turn the tortoise right-side up; stop when the green check appears.

Colors in this level:

Green, Brown, Gray, Black, Orange

Leaving the right-hand hole open, which gives the mole an alternate route and does not produce the successful turn.
Dropping the rock beside the hole instead of covering the hole completely.
Trying to rotate the tortoise by tapping or dragging its shell in the open field.
Moving the tortoise into the covered right-hand hole instead of the remaining open hole.

Use the gray rock to close the hole on the right.
Drag the upside-down tortoise into the remaining left-hand hole.
Wait for the mole to turn the tortoise over instead of trying to rotate the animal directly.

Board notes 5 details

Layout: An upside-down green tortoise lies at the lower-left, a brown mole pops out of a hole above it, a girl stands at the right, and a gray rock sits above the right-hand hole; a second open hole is at the lower-left.
Goal: Close the right-hand hole with the rock, send the tortoise through the remaining left-hand hole, and let the mole return it right-side up.
Opening: Press and hold the gray rock above the right-hand hole.
Danger Zone: The girl, the stone as a standalone object, and the mole are not separate final targets; leave one hole open for the tortoise and do not release the rock beside it.
Mechanics: The rock blocks one tunnel while the tortoise travels through the other; after the mole reaches it, the tortoise reappears upright and the green check appears.

Which hole should the rock cover?
Drag the gray rock onto the hole on the right side of the play area.
Where should I put the tortoise?
After the right hole is blocked, drag the upside-down tortoise into the open hole at the lower-left.
How does the tortoise turn over?
The mole uses the open tunnel to reach the tortoise; wait for it to reappear upright.
Why does the tortoise start upside down?
The upside-down orientation lets it slide through the unblocked hole. The mole on the other side flips it right-side up.