Actually lasting up to 10 minutes is pretty hard (my personal best is 11 and I'm the dev... Sike...) so lasting 3 minutes is very solid! Glad you found the visuals and audio good.
The walls were a leftover when I was planning to make it a traditional third person action game, but your suggestion to remove them and actually make it an aerial/floating arena is genius!! It even gave me ideas for additional levels and combinations due to the hexagon arena shape. Thank you for the awesome feedback and for playing!