The game currently under development, is not playable for me.
The selection of the Gamepad does not work, the choice automatically returns to the mouse.
And the mouse wants to go down to the left!
Any advice or explanation, will it really be good.
Thank you

Version 20.03.29.03

Configuration:
OS Linux Mint 19.3 Kernels 4.15.0-99
Nvidia GPU, Open Source drivers: Mesa
Gamepad F310 F710
Roccat Suora keyboard, no pilot
Mouse Corsaire fil, no pilot

https://www.pcgamingwiki.com/wiki/Soul_Saga

Some users had an issue with this on the Steam forum. This is what they discussed there:
https://steamcommunity.com/app/251590/discussions/0/1864993626711433654/

Ho thank you very much:)
I have the honor of having an answer from the developer in person?
Happy with your interest, and to support your project!
I would like to take this opportunity to say a big THANK YOU for supporting Linux :-)
My only OS since 2015!

This discussion about Steam didn’t help, but it’s still interesting and gives a possible explanation:
The controller may not be recognized.
The problem is still there for now, but I will be patient.
Thank you;-)

Soon some news ?
I don't want to stress you, I know how to be patient, it's just to let you know that I'm counting on you.
https://www.gogdb.org/product/1792376179#downloads