Edit: regarding your request (up + fire for subweapon), I did an experimental version that does that. Tested only with knife at beginning, but in theory it should work with all weapons. It's activated by default if up_for_jump isn't enabled. Download link: https://drive.google.com/file/d/12BFGB7o4H1CjYthFyHLb4otyP5rXjij0/view?usp=shari...
Stairs tips and hints: what most people I see playing do (me inclusive) is to just keep pressing right and up at same time a couple of meters before stairs: Simon keeps walking towards the stairs and as soon as you're on the spot, he'll snap on the ladder and go upstairs. To get down, you don't do anything, it just goes downhill like if it's a 45-degree slope down. You can move right and left on a ladder, not just up and down (same as SNES Super CV).
Check picture below, I hope it shows the spot clearly: there's a hard limit regarding spot position (the grid is fixed, it is not flexible, grid size is fixed by the Amiga's blitter at 16x16 pixels in size and you have them at position 0, 16, 32 and so on). I'm afraid I can't do much more in that regard, I did my best.
But I'll check the DS4 controller issue on FS-UAE 3.1.68, and I at some point I may implement the up+fire for subs because it's been requested often. Thanks again!
