Fun, had a great time! While I do think the gameplay was solid, there were a bunch of little things that confused me: others have already mentioned the initial tutorial (my mouse scroll doesn't work properly and it wasn't clear that I had to scroll; a scroll bar on the side would've been very appreciated both for clarity and my lack of middle mouse control) and the opacity of certain visual effects. Personally, the thing that weirded me out the most was how the top right spawner "!" icon in the 2nd level was mostly obscured by the "Tower" button/menu. Looking at the screenshots you provided of the game and the fact the tutorial menu is slightly off center, I'd guess that you tested the game in 2:1/18:9/equivalent, but the 16:9 viewport causes the tower menu to obscure that part of the map (which might've just been an itch.io setting that you missed, I think "Viewport Dimensions"?). Aside from those, good game! My favorite part was the twist for the final wave of level 3. I was taken very off guard after spamming towers in the middle of the previous wave, knowing I wouldn't meet the point quota. :)