I agree with the pause and mute buttons... I really enjoy the tempest, asteroids, invaders, throwbacks.... effects are nice.... if the ship was a little faster and or/ the camera pulled back just a little, this game would be a 5
First the good: The Art is nice, I like the marker for the catapult target. Music is good, SFX are a little repetitive, but well done, and the overall experience is a 4 out of 5, not bad.
The Bad, seems to be really glitchy... Am I supposed to be winning the battle in wave 2 of 3? the battles get old and repetitive... different terrain? enemy walls and fortifications? different objectives? capture the flag in a level or two? maybe two sided enemy attacks... definately more upgrades...
Overall a good game, that could be made a 5 really easily.