Solid entry! The pixel art and music/SFX both worked well, but regarding the former, some scaling up might've been nice (i.e. there were a handful of times where I wished the hitboxes were bigger because I was sure that I hit an enemy, and trying to read the numbers for the stats at the bottom was difficult). Plus, I couldn't figure out the purpose of the paths on the grass; were these just visual flourishes? If so, maybe a few flowers or something could work as background elements instead.
One other issue that I struggled with was hitting upgrades by mistake. A confirmation button would've been nice when selecting an ability; most of the time, when the upgrade screen came around, I clicked an upgrade accidentally because I was just about to press on an enemy when it popped up.
This was pretty cool all in all!