Really cool take on the tower defense genre. I liked the visuals and music, though it looks like the assets for the traps and walls only loaded for the tutorial and were just white squares for the actual game, which made it hard to remember what I put where. I also had a panicked moment after I bought the second ring where I was trying to figure out how to switch between rings, I figured it out quick enough, but it might be good to add a tool tip. Lastly, the turret's red view triangles were pretty hard to see against the purple background, might be good to make a small adjustment to make them easier to see. The old school sprites for the enemies were also really fun and overall I had a lot of fun playing the game and wanted more.