Although this branch is not a place for asking help for achievment. But probably I can give you some clues
1. sat on the ball worked as intended - we checked it. Bunny's bottom should be straight on the ball on the time. But it's hard to do it.
2. there is a mini-game with chickens but you should find out how to cause it to appear

Jellinator님이 먼저 게시:

Clueless about the hidden achievements - Sat on the ball for 15 seconds but no achievement, tried booting chickens together and feeding them carrots but no effects. Seems possible we'll never figure these out

Please add an option to custom-set the size of the grid and the number of bombs.

BOB_nachiketaom님이 먼저 게시:

Please add an option to custom-set the size of the grid and the number of bombs.

Thanks for the suggestion!
We have no plans for custom mode now but we will consider it for possible future game mode.

original minesweeper has a feature when u left + right on a number at the same time it automatically reveals the adjacent spots if the number of flags satisfy the current number.
could you add this feature in?