I like this concept a lot, there's definitely a lot of polish that it needs but it's a game I'd be interested in playing more of!
The beginning of the game was rough, I didn't really know what most of the upgrades did and there weren't any clear indicators that they were doing anything, and the target flying around so fast made it hard to get enough souls to upgrade anything substantially - I had to take the game out of full screen just to keep up with it lol
Is there a win state or does it just continue endlessly after the corruption bar is filled?