Space Station Sabotage

I made this game in 3 hours and 15 minutes for the 188th Trijam. The theme is Sabotage and I made a mix between a space shooter and a tower defence game. 

Gameplay 

Your goal is to defend your space station by placing spaceship units on meteorites. With every enemy destroyed you earn currency, that you can spend on more and better defence.  The enemies become faster and stronger over time.  Try to survive as long as you can, because it isn't guaranteed that you can win against the enemy forces.

Controls 

[left mouse button]: select and place units

[right mouse button]: cancel placement

[space] start, end or restart the game.

Credits 

Shield Generator

 Assets: Gustavo Vituri

Music: David Renda

*  Try to beat my  score of 248 ;) *