This is a pretty good shooter. I didn't immediately realize that each enemy type was only vulnerable to one attack, but it was pretty easy to figure out which is which. The enemy designs are good.
My main critique is that it's not a roguelike at all. Roguelike elements could be added though, if there were multiple waves and you could pick from randomized upgrades. Given the theme of the game, those upgrades would also probably have drawbacks that you have to play around.
Besides, I found the game because of the roguelike tag so it did get my attention even if it's technically false advertising.