The game is very laggy so i would consider using turbowarp, https://turbowarp.org/1225597068
v0.1 added physics, a floor, and a purple square v0.2 added a single level to complete, and a door that brings you to the next level (COMING SOON) also named the project "Platformer" v0.3 added another level and renamed the project to "Platformer (2 Levels)" and turned the purple cube into a green friend who blinks v0.4 added levels 3 and 4 and removed the "(2 Levels)" tag from the title v0.5 added the backrooms and finished level 4 v0.6 the backrooms is now a chase scene