Many thanks to everyone. After the release of the Kubeon's demo, players pointed out some bad input behaviours. Everythings has been fixed and the Steamdeck compatibility has been checked (thanks to some people on Reddit).
Here is the full patch note :
Kubeon 0.8.3
D-PAD inputs has been added to the game
A and B buttons has been reversed to meet the largest number of controllers (every PS and XBOX controllers basically)
See you later for a futur update ! <3