We've got a spreadsheet of the 100+ games we rated between the two of us, here are some of my favourites:
#106 - Naughty Knight: https://itch.io/jam/gmtk-2019/rate/462613
A chess game where you control only one piece (the knight). Fantastic character design, clever puzzles, and pretty unique. I gave this one a perfect score.
#510 - Grapple: https://itch.io/jam/gmtk-2019/rate/461560
A GameBoy styled metroidvania, with creative use of a single item for multiple purposes
#294 - Arrows Left: https://itch.io/jam/gmtk-2019/rate/460349
Minimalist game where you need to plan your actions in advance because of limited movement ability
#540 - a game about a guy and his clones: https://itch.io/jam/gmtk-2019/rate/463247
At first when I played this I found it very confusing, but once it clicked I was amazed by how genius it is. Came back after the ratings closed to complete it.
#1398 - Wrong Turn: https://itch.io/jam/gmtk-2019/rate/463246
It's criminal that this game only got five ratings. So much polish, felt so good to play, and clever levels too. We both played this one and loved it.
#510 - One Screen Platformer: https://itch.io/jam/gmtk-2019/rate/461360
A clever platformer where the level changes but still stays on only one screen. Great use of "only one light" as well as "only one screen".
#178 - Relyscraper: https://itch.io/jam/gmtk-2019/rate/463560
Probably the best "only one platform" game I saw of everything I played. Super difficult though, got to the last level and couldn't beat it.
None of my favourites made it into the top 100! (sadface) But hopefully they can get a few more plays now, because they deserve it.