[archievillain]

I would also recommend TIS-100's "sequel", Shenzhen I/O. TIS-100 is a bit 'dry', with the puzzles being entirely abstract. In SI/O, you roleplay as a developer emigrating to China for work, so all the puzzles are framed as real products you are developing for your company. One of the earlier puzzles, for example, is programming the equipment for a lasertag place.

[blashyrk]

I second the Shenzhen I/O recommendation, because apart from only assembly programming, the game also has other constraints in the form of having to spacially arange various chips on a limited "enclosure" for the product you're building and connect them. It also rewards optimization both in terms of assembly and chip usage efficiency. Is a wonderful game, really.

[praptak]

It also has a really cool solitaire game-in-game as an... addition? Ornament?