Graphics are really nice and the concept is actually great. However, I think if you had polished a little bit more, it would be so much better. The mechanic of jumping through portals is actually really powerful(ratchet and clank of PS5 is doing this) so it is a great idea but the game is not very easy to play. First I think you should add some crosshair, so the player can aim. And the bullet range is very short, sometimes enemies are really close to you and you can't hit them.
Anyway, it is a cool game and a cool idea but if your work a little bit more then you could even release in places like steam!