Perspective from game-tester and user-experience designer.
I love score-chaser shooters like Writhe on the Nintendo Switch or Devil Daggers on Steam, so this was really fun to play. Nailed the speed and fluidity of motion, didn't seem necessary to keep upgrading my speed past a certain point though and I didn't see any benefit to upgrading my jump height at least in this current build of the game. However, I could've played this for a lot longer and still had a lot of fun. The Wave information appears over your upgrade menu and makes it hard to see what I'm clicking or what the effect is, and one time the red haze from being damaged persisted over my view for the rest of a run. Highest wave was Wave 6, and I only played for about 20-30 minutes tops, I don't know if new enemies would pop up later or if there was a win-state.. Aside from the skeletons being present, I don't know how this fit the theme "Death is an opportunity."
Thanks for popping into my stream on Tuesday, sorry we didn't play it while you were around. This was a lot of fun and I'd love to see a more fleshed out score-chaser from you in the future, if this is what you were able to do in a short time-span.