Not bad, but buggy
The animation was fluid, though the lag eventually got pretty bad. A quality setting on the menu would be helpful, as would a pause button. There was a bug where once the boss was beaten, there was no way to actually board the ship- fixing that would be lovely.
I enjoyed it
Gameplay was smooth, story was fine and controls were pretty good.
As for improvements I suggest making the wave timer a little longer and limit the wave types to each level it just got a little overwhelming at times. Power up drops would be a plus and possibly more upgrades with more varying uses like a flamethrower with limited range but fast attack and damage with a damage over time effect would be neat.
Good game, but you can't save. This seems to be a fairly large game, and isn't one that everyone can play in one single sitting. This brought your mark done by a lot. It would be 5 stars if you could save your progress. Since you can't I'm going to have to give you a 3.
Good design, but it had some serious flaws.
The first and foremost being that when you die and start again the abilities you took during your last playthrough are still checked off, but you don't receive the bonuses for them. For example, if you chose the regeneration ability, you won't be able to chose it again, but your health will regenerate at the standard speed. This basically means that unless you beat the game without ever dying, you don't have access to most of the perks that should be available.
The teleportation was buggy as well. At least half a dozen times I killed all the enemies in the area but the teleporter didn't work, so I just had to wait for the next wave and try again.
Overall it was a pretty cool game, but the bugs definitely limited my enjoyment.
that game was really good until i died..AND HAD TO START ALL OVER!