Micro Mages
Micro Mages is a new NES platformer that supports up to 4 players at once. This game looks awesome! Morphcat Games (the developer) wanted to challenge themselves to fit this entire game into 40 kilobytes (the size of the original Super Mario Bros). They have a great video on how they compressed some of the art assets to get more out of the game with a limited amount of space. Their kickstarter says that they have the game completed, now they just need to make the physical assets. Their plan is to release the first batch of games in April and the second batch in May. You can pledge for just a digital copy of the ROM or for a physical release.
This looks like a modern indie title. Impressive they could fit this in 40k on a NES cart! I’m going to back this just not sure at what level. That said there really are only a few choices as this seems wildly popular.
I went with a physical copy.