Hi! If this is your first time putting a game on itch.io, know that people prefer if you package your game as a .zip file (GameMaker lets you choose when you press export). Even for my commercial games, 2 or 3 people (compared to 60ish) used the installer instead of the zip.

If you're making a game at a low resolution like this, it's a good idea to scale the window up so players aren't staring at a little spot on the screen. For pixel-perfect scaling like for this jam, use window_resize(84*6, 48*6) at Game Start, replacing 6 with whatever scale factor you want to use. (I also suggest adding alarm[0] = 1 and putting window_center() in Alarm 0, to, well, center the window after scaling it.) I believe GM has a minimum window size and that's why it's scaled with an imperfect aspect ratio.