I really liked the art style of this game! I got a bit confused initially by the tutorial and the need for houses, but when I restarted and realised how the houses worked I had a lot of fun. I think the confusion is just because the buttons for the houses do not match what the buildings look like (unlike the buttons for turrets etc). I also had a bug once or twice where I got multiple of the same upgrade as choices (e.g. decoy health multiple times). It would also be nice if there was a check to prevent all three upgrades being for the same thing (e.g. 3 decoy upgrades). Very fun though and I found it hard to put down!