How long is this game? And will it get achievements?

I'm concerned about the inability to remap keys.. I'm not gonna use arrow keys to move, allow us to use wasd to move, as has been standard since 2003, so that we dont have to cross our arms, and slam our noses into the keyboard just to perform basic jumps...

Will this game work on my Steam Deck?

Fun little game! But I have to stop ground-pounding during the boss battle , because this is the third time I phased through the wall... ^^' Screenshot : https://imgur.com/a/DlmwMO3