It's too easy and there are some things missing that I wish were there. But overall, you only need to change a couple things to make this really something. Personally, I think the laser gun should shoot slower, or have a lower pitch sound effect (The multiple high pitches all at the same time are irritating on the ears). Also, more enemies doesn't make this game harder. I love the mechanics and I think they're really nice and fit the theme well, but I think fewer enemies which are stronger and shoot faster would be more interesting. The different guns provide a nice interweave between killing a single enemy and killing multiple enemies. Also, there are invisible walls around the edges of the map. Please make them visible >.< Love the particle effects and the different colours. Great job,! It's really cool, just needs a bit of polishing to make it fun for longer
