A decent game.
Pretty impressed with this game overall. I didn't like how the enemies just spawned out of nowhere - it's a scrolling game so they should be able to come in from the top of the screen. Also, a continuous fire option would have been nice, as I found myself holding down the space bar for the entire game. And the menu screens could use some improvement - more than just blank blue backgrounds. But I did like the in-game graphics for the most part, as well as the variation of enemies with each level. You definitely put some work into making each wave different than the one before, and I appreciate that. And the music choice was good (although sound effects would be a nice improvement). Now, in your author comments you say not to review or rate without playing through the entire game. This seems like a lot to ask, seeing as I couldn't even beat level four. But a good game should draw the player in early and give them a good impression from the start. The whole gameplay experience should be enjoyable, not just the final levels or the satisfaction of beating the whole thing. And your game actually does a decent job of this. As a developer, you should never try to avoid or discourage criticism of your work, because without listening to your players, you won't grow as a developer and you'll never get better at making games. The other reviewers have raised some valid points that would really help improve this game. Overall, there's room for improvement but it's a decent game as it is. Nice work.