Great prototype for a game.. .the first three levels are great :)
Couple of bugs though... I have installed the game via the itch.io app on Windows (10) and and it from the itch.io app and F4 seems to crash the game as well - Windows still responds but the window and the "x" close button no longer responds and I need to close the itch.io app to close the game! As long as you just use the window maximise button there is no problem and the game is (nearly) fullscreen! :)
P.S. So much spare space in the last suitcase... could definitely have fit in a couple more cartridges or a controller! ;)