SS Tea Cup

Bugs

27: In the first room, find the rightmost Helmut and bump into him from the right side. He'll bump you up and when you're bumped into the ceiling you'll hear the sound of the Helmut continuously pushing you away.

30: Stand on the blocks above the treasure gate. The skull over the gate will be missing and the gate will appear like a normal portal.

30: The Big Bird doesn't move backwards if you duck.

Silly challenges

27: After you've picked up the star, use your invincibility to get hearts out of the insects that fly away when you approach them.

30: Take the key with you to the boss.

30: Kill the boss without touching the smaller birds it produces.

30: When you have defeated the Big Bird and the coins start falling, you'll see glitches of the coins in the bottom of the screen.

Screenshots