Nice old school-ish game!
I like the simple one-hand-control (WASD or left, right, up, down) and the simple, but original idea of certain blocks that make you shrink, jump or can kill you instantly.
Btw, I think there is a bug in level 2-9. I died several times just by touching the dolphin
(the one that is made of jump blocks and which has the first acess token).
Good work! Cheers!