Great, fun lil' platformer!
The gameplay is really nice, you nailed the physics! Both the movement and the jump felt precise, which is always a must for platformers. The connection to the theme is great, I really liked how the aesthetic of the game changed depending on the console! The music, while simple, works great with the presentation overall.
Two things that could be better are the ladders and the camera; the ladders could work like normal ladders, deactivating the gravity and making you move with W/S, and the camera doesn't let you go back to the left, which made me lose the first cartridge the second time I played it T_T
As I said earlier, I played it twice to get all the cartridges! Had a blast doing that extra platforming! ^^
Really good entry overall! Amazing work, keep it up!!! ^^