This game was a lot of fun, and kind of addictive. I could definitely see this working well as a mobile game. The upgrade system was really well balanced, and kept things interesting without making them too easy. The points were also distributed well. You get enough that you can get fun upgrades, but not enough that you get everything right away. In my opinion, it did get a little boring having to play back through the early levels late in the game when you have lots of upgrades. Maybe giving an option to skip to the level you died on would work? Either way, good work!