Rated yours as well! my random assorted feedback/thoughts!
- I originally struggled on mobile where there is no hover -- the game definitely makes a lot more sense with a mouse where you can hover for price info and pickups and aiming
- Leaderboard only shows the top 20 -- would be nice if it showed the top 20, and then a 21st row always showing you and your rank (unless you're in the top 20 already) ah it does, my results were just lost from switching from phone to computer
- The threats after boss kill seem insanely strong! +240% costs (as compared to like +50% or even +100%), -95% energy regen (as compared to -25% or -50%), etc
- The "upgrade bios" button at the bottom was a little unclear to me, I didn't find it for my first 5 or 6 runs
- Auto-buying the tower slots could be a nice upgrade to have later on, as it gets a little repetitive feeling
- It was also unclear to me what the "RECHARGE" button does -- all buttons would benefit from tooltips explaining them in a simple line
- You can kill enemies underneath the various UI elements/buttons/displays and not see or barely see the drops from them -- same thing off the edge of the screen either fully or partially
- The buttons being at the bottom center and health info at the top left also feels a little disarming -- maybe they could be grouped better so you have less places to zoom your eyes around? I found it really hard to look at my health/money amount because I couldn't keep looking over there -- but maybe I just need to learn the key controls so I don't need the on screen buttons as much
Overall it is fun to play and the rate of progression feels good -- first boss kill took 3 or 4 runs. Some upgrades are much more rewarding than others so you do have to think about which ones to prioritize. Hope you continue to improve it!