I liked the music, sound effects, and minimalist art a lot. I wish the map would clear of balloons once you die because sometimes you get stuck in this infinite death loop. I didn't survive for super long so it could be possible this is in that game, but to keep the player engaged for the full 60 seconds, you could try adding different color balloons that have different movement patterns. Although I did not get the counter down to zero, I had fun playing. Very challenging and fun.