Suprisingly nice balanced, initilly little simple but once i got other guns and hang of when to use what. It felt to me that each gun had its place. Maybe you could have lowered their price a little since at start there is little to do.
I had some bug/featuer? that i think "stole" some of my gold away, i was pretty sure i could afford more than 1 upgrade but then i had just 0 gold after buying one. This initially scared me away from going for long runs and just made me die once i had enough gold. Later this bug/feature didnt happen i could buy tons of updgrades.
I really like that you left the last rounds gold stay on the map (bug turned feature :D?). It really made the progression easier and something to do initially with the easy waves.
Some more feedback when getting hurt would have made it more immersive. Just a simple clear sound effect etc would have made getting overrun so much better (ofc animation even better but time is limited). Now its little lacluster and noticing whenthey are hitting me was hard.
The visuals are pretty simple but work and are clear.
Well that turned quite a long. I really enjoyed this evn though its pretty simple, the game balance felt really good and made me play to 9 dmg,8 cd and all weapons (glass cannon is the way). After that run, since the start is so slow i, stopped. Plus there was no clear indication if the following waves would have new enemies to discover. (more than green?)