I've learned a bit about coding NES games in assembly during these lockdown months, so I'm doing my gamejam submissions in form of NES roms.
Blob Land is my submission for https://itch.io/jam/1jam-uno, and it's a single-screen platformer - portals change the level around the player.
It can be played on a browser NES emulator here: https://nes.scardua.net/
Itch.io page: https://wendelscardua.itch.io/blobland