Well done, I wasn't able to beat it, but got pretty far! I liked the music and sound effects you decided to use. I am using a trackpad - so was able to use the arrows and just hold down the trackpad to shoot. I like how you had a nice chime sound happen when the level switched, but I didn't notice why that chime was happening at first. It might be nice to make it more obvious that the player has levelled up - to give a sense of reward that they're making progress. I also wish it was more obvious if this game has an ending or if the point is to try to get the highest score. From my 2nd last play, I think I saw that I was almost at the last level - but wasn't able to get to that point again and just gave up. However, if I knew for sure there's potential to "beat" the game I'd be more likely to keep playing - to get that sense of reward from completing it.