I was able to get farther thanks to the save feature. Like clockwork every 7.5 levels, 7 to 8 levels, crash. I'd like to see more enemies. Maybe 1 new stronger enemy every 10 levels or something. And just personal preference I wish I could reset the game or minus upgrades if I want to reduce fire rate or lines number. (Some of the later "bullets" look really cool and I want to reduce fire rate to see them better so they don't just blend into a stream overlapping with each other) Fun game overall. Still playing and almost at T50. Just to get to see what the next weapon will look like makes me want to keep playing. Different enemies would add to that even more.