I like the idea behind it! That map being a 3D loop with 2D art seems interesting, though in the current state there really isnt any real reason to interact with the loop. The best strategy I found was to stand still and turn left and right to attack the melee ranged enemies. So maybe making it to where you get rewarded for how far around the loop you get on each wave, or tie the waves to completing a loop, or something of that nature. Also making the game harder would help the gameplay a fair bit. I would also map the pause menu to the 'ESC' key as well instead of only having it be a on-screen button lol
But still, I probably played for a good 25-30 minutes so the gameplay is definitely entertaining! It just needs a bit more polish and progression!