So basically, I'd probably feel more comfortable with WASD + Space controls rather than Arrow Keys + Shift controls, would I be able to change the keybinds or could you add a feature that allows me to do that?

The keybinds in the demo version are super messy, technically a few buttons *are* configurable but a few are also hardcoded, including the A and E keys, so WASD might do messy stuff. If you go into Appdata > Local > I_Wanna_Lockpick then open "config.ini", under the Controls section you should see stuff you can change. Setting Jump to 32 instead of 16 will let you use Space to jump. If you see any other binds you'd like to change, you can try plugging in numbers from this post: http://www.davetech.co.uk/gamemakerkeyboardasciicodes

Unfortunately, as I said before about some hardcoded key binds, the A and E keys are "force set" to certain things, so WASD might mess up by overlapping it. For the time being IJKL is the main alternative I could suggest, but I can't fix controls in the demo anymore since I don't have the files for it. I'll be making sure that you can properly set the controls you want in the full version, but waiting for release for that might be unsatisfactory. Regardless, I hope this post could at least slightly help.