For some unknown reason, the site claimed my account doesn’t exist, so I recreated it using my E-mail and wanted to check if a small edit works just as fine.
Due to the fact that CajeASM hasn't been updated by me for many years, still has some odd bugs regarding instruction counter and due to the fact that (nowadays) better alternatives exist now, I've decided to delete this tool from this website. An alternative assembler I can recommend is bass, currently maintained by ARM9. To be found here: https://github.com/ARM9/bass
Here is a full level hack of Super Mario Bros. 2 which changes all the levels and also adds more of a degree of difficulty to it. Some of the graphics have also been changed.