from Senki:

Head Crok enzyme glutton and eat everything there is to the screen. But Pabos, enzymes purple roam around and they too are hungry!

-- Pen or pad: move
-- L or R to renew food
You get bonus points by eating more food in the same way as a result.

History
v1.0.0: first playable

Other Information
Crok is my first game for Nintendo DS. You find the source code with the game, please let me suggestions for improving the game!