Contrary to what others say, implementing loot locker was kind of easy actually. Gamemaker Studio 2 made it easy is why (at least from what I think). The hardest part was level designing. For some reason I decided that my game was gonna have relatively nice designs which meant that designing it would take so much longer. I originally planned 5 maps but because of the time crunch, I had to reduce it to four. The game still came out great though and it was fun!