The game is cool and the fact that every level is a different type of game really adds to the lore of it being someone trying to learn how to game dev.
The platformer section is the one that feels the most like a finished game, even if it is rough around the spots. Reminded me a bit of the old Flash platformers I played back in the day. I liked the different types of platforms. The hitbox for the spikes was a little counter intuitive (as in, it went a little higher than the sprite would indicate) and the movement was a little too sudden, but that did help make the game feel harder overall. It was a fun experience (if only a bit rage inducing).
The stealth section was fun, but perhaps a bit too easy. The art really came together on this one though. Other than the bits with the dev on their apartment, I would say it was the most charming art on the game. There was a little bug where enemies could get you across the wall that killed me a few times, but it was easy to work around it.
The FPS section was the clunkiest (and the game recognizes it XD). If the platform section had slightly too sudden movement, this one had painfully slow turning (while still being fast for easily aiming). There were also two game breaking bugs here as well. One was that you can just fall off the map by going left and the game just keeps going with you falling, effectively hard locking you. The other is that, if you play the FPS game before the others, the mouse will be forever locked to the center of the screen, meaning that, the next time you try to select a section/game to play, you can only select the stealth section so, if you didn't do the platforming one before it, you are soft locked.
All in all, I liked the game. It was fun and it did capture what a dev's first few games are probably going to be like. The fact that you did systems for all three types is also a feat considering it is a game jam.
Great work!