The graphics are really charming and the weapon switch system is neat and efficient. Unfortunately though, I couldn't figure out how the game works. Is the little crab an enemy? What was the little path he created when he ran away? What is the teleportation device for? And are there supposed to be more enemies attacking the crystals?
If possible, consider adding a "how to play" section to the game description :) I'd love to give this game a proper chance.
-S