I'm really impressed by this! The 3d menus, character customisation and a cpu opponent all show a high level of polish. The character customisation in particular I was not expecting but adds so much to your game, and I'm a huge fan of the idle animations that play while you're choosing.
The models and animations work really effectively and flow together well, however I do think that the animations could be a bit more responsive to the player's inputs, it's sometimes a bit difficult to register what my key presses are actually doing. I also found a few times the opponent just would stop attacking all together, I think it was when they reached a low enough amount of health but not 100% sure this was the reason.
Overall I genuinely had a lot of fun playing this, there's so much in this game to make it stand out. Really well done!