Ok, concept and art was great, and so was the gameplay I guess, but thing is... The code isn't. The program is called "Made in Gamemaker Studio 2" and the installer says so aswell, which is quite confusing. I thought I was installing a framework or something, leading me to store it in a folder called "MiGM" (Made in Game Maker), which I will definitely forget forcing me to reinstall the game if I ever feel like playing it again.
Additionally, despite being windowed, it locks my mouse into the window; I can't move it out to do anything else - even just moving the game window - unless I press the start button or use alt + tab. Interestingly, the mouse is not locked during the opening scene of the game, despite already being locked on the main menu.
Interesting aspect of the game's strange mouse behaviour; if I start it from the executable directly (which is my only choice considering I declined the start menu shortcut since, y'know, I thought it was a framework), it usually (but not always) starts with the game minimised, which interestingly locks my mouse onto what seems to be a single, nonexistent pixel on the screen until I alt + tab into the game window. (The top left corner of the game's window, maybe?)
Also, I wasn't able to finish the game because I clicked the quarters in my inventory and an error occured, crashing the program and deleting my progress. This is a bug that is reproduced everytime I click the quarters in my inventory. It seems there is unfinished code for interacting with them, or something like that. (Update: turns out the quarters aren't the issue, the issue is clicking any part of the inventory that doesn't contain an item. This is a HUGE issue. It means I have to be careful whenever I interact with the inventory. Plus, Gilbert may lead people to believe they should just drag the quarters onto him like a normal item.)
Aditionally, during the initial dialogue, switching scenes with the arrow on the left or the subsequent arrow on the right will not only switch scenes, but also register that you clicked a dialogue option, which on it's own is a janky system that for some reason hides your mouse.
Plus, the blacktop door says "To the Blacktop", even when it is not yet usable. Also affects the front door.
Oh, and the open locker + all characters are layered over the mouse click effect.
I actually ended up finishing the game, but I needed to scour the comments to figure out how.