Congrats on submitting a game for your first solo game jam, that's a huge accomplishment! I know it's tough making a game in a short time; this was also my first jam too, so I also found working under a time limit super challenging, so kudos for making a submission!
In regards to feedback, I think something that could be worked on is the movement controls, as it felt like I was controlling a character on ice instead of moving them normally. It felt like there was an acceleration system, but for a simple top down game like this, you could probably get away with moving at constant speed in any direction, that way the player feels like they're under control of their movement. Interestingly enough, after I got used to it I had some fun with the high acceleration and trying to move around efficiently lol, that movement style could be its own game!
I thought the idea of adding colors to the world as you progressed was a nice touch, and what you implemented in the second half could be cool to expand on; maybe there could be multiple sections of this house that you could explore and look for keys/doors in. That way there could be more content and areas to move around in.
Hopefully that doesn't come off as harsh and sounds more constructive instead, because to me, overall this is a very solid entry for your first jam game! Keep up the good work, you're definitely making great progress!