This was fun! The intensity was immediate and the upgrades were impactful. Does it have an end or do you just survive as long as possible?
The upgrade card with the darker blue background is hard to read at first. I can imagine some people may not be able to read it at all.
It felt like I was being given upgrades at random intervals? I'm still not sure if it was based on how many skulls I killed or some other factor I couldn't parse. Some indication of how close we are to the next one would be nice.
The bloodstains build up fast. I imagine it wouldn't become a computing problem very easily but it could make for a lot of visual clutter if you were to scale this game up.
Overall, I enjoyed this! Reminiscent of both Vampire Survivors and Nuclear Throne, both of which I love.