Defend the Planet

"Oh no! your planet is under attack!
you must defend your planet against the evil alien invasion or your planet will be destroyed entirely. once you touch the lava core of the planet, it's game over! aim with the mouse and click to fire! use A and D to move and space to jump!"

My First Ludum Dare Entry ^^
I hope this was worth the lack of sleep xD

Also look out for powerups, including high jumps, rapid fire and speed boost!