I really enjoyed this game! The gameplay loop is fun and solid, and although there are only a few different types of enemies I think you did a great job of making them feel different and have different AI. For example, the red robots and the purple bats both attack you physically but the bats stay far away and then swoop in to attack you which feels completely different than how the red robot attacks. The one issue I had was that the background was too shaky and made me a little nauseous, but other than that great game :)