Hey LaksamanaTyfoon,
This is executed pretty well. The controls and movement felt right. I like how the tops look with their cool colours and shapes with a touch of randomness. I also like the audio you chose for collision feedback.
I could not tell whether this mechanic existed but I think it would be cool to regenerate the health when players move faster (Obviously, it needs playtesting to ensure balance in design.)
The pillar in the centre was a bit annoying as it blocked the view of a part of the ring, but the collision aspect of it is not bad since it affects the movement of player and NPC in a relatively good way.
I wonder how it would be to keep the destroyed tops on the ring for the whole round instead of deleting them from scene immediately. But don't make them affect the player's movement much, or at all.
It's a lovely game, and with further polish, it can be better enjoyable. Nice work!