Excellent art. No audio.
The portals are set up a little awkwardly, causing you frequently walk back through the receiving portal due to where you're placed. Somewhat of a skill issue on my part though.
The text game is nice, though a little specific for key words. Decently descriptive, directions work, and instant death may or may not await you.
The maze game keys have no texture, so you just walk around hoping you hit every tile and pick up the multiple keys needed to open the door. 2 isn't enough, and I don't care to figure out where a hypothetical 3rd or 4th is. If there was an indication (say, adding a number of keyholes) and I didn't have to come check each time I pick up a key I might be more inclined to look around. Being colorblind seems of no consequence either, though it is a silly gag.
I stopped playing at the maze, because the gameplay wasn't fun to me. I think adding a few more visual cues would be beneficial, you clearly have the artistic skill to do so. The experience is hamstrung by the lack of any audio- a simple 8-bit, 8-measure loop and a couple SFX would make the game far more enjoyable in my opinion. While I have some nitpicks, the game is well put together and I didn't find any bugs. For a game made in a week, great work!