Neat game, I like the minions defending for me (because I'm lazy) and upgrading them.
The first session I died to wave 3 before really being able to purchase anything, but the second session (which I had purchased the same) I managed to get to wave 10 before succumbing to the large blue bois, because they are rooough to deal with. Mostly because of the attrition of having to heal up and not having enough to upgrade anything else.
I like the aesthetic, and the strong thematic colouring of the enemies.
Nice job :D