the dev room is achieved by holding all of the move buttons then pressing select in the first town near to the slime

Thanks. I'm only missing the developer's room achievement now, which neither triggered inside the house next to Zach's house (not even when triggering/losing the fight) nor when choosing the "limpa challenge" beyond the "softlock bridge" nor inside the church by examining the spot in the lower right corner. Do I need to beat the "developer boss(es)" (which seems to be pretty much impossible even at level 30+) or is the developer's room hidden somewhere else?

I didn't even plan for you to be there, I'll remove it but there isn't really anything to do atm.

If you just remove the two arrow floor tiles at the beginning of the cave, I can (and probably will) continue my playthrough, since the challenging boss fights provide sufficient motivation to complete the game.

not my fault

Since I've already wasted 7 hours, I'm not eligible for a refund, and despite sunk cost fallacy, I like to see things through to the end. Is there any chance you're going to fix the bugs I reported (stuck in left cave path, accessory vendor in Mining City) in a timely manner? Normally, I wouldn't ask here, but you've ignored my posts on the Steam forum so far.

dude, if you're that angry just refund the game.

You're obviously trying to troll the players. It's really annoying considering how unfunny, bad and bugged your game is.