Lil'Thulu : Doom Rising

Arrow keys or WASD to move, K to use Tentacle to eat, Space to use dash/shell bash, and Escape to pause game.

Eating clam shells gives you the bash ability that allows you to break spikes and rocks. 

Inspired by Ecco the Dolphin on the Sega Genesis and Kirby you play as Lil'Thulu devouring creatures of the deep to gain powers. But you're still Lil' so be careful as some things in the deep will end your reign early. Avoid dangers and solve puzzles to make it to the end of the level.