Nice idea! Making a roguelike with puzzle elements seems fun and I am excited to see where you will branch out from this :D I also love your sprites for Bae and IRYS, they are very cute! One thing that surprised me was how you decided to implement PAD functionality.
Some feedback aside from basic things that could be refined, like Bae’s attack, SFX, and terrain collision is to consider gameplay execution. I actually didn’t run into any puzzles on my first playthrough (It was the same room with Bae’s mouse 3 times in a row) and just stumbled into IRYS, so I was pretty confused about how I got there. So maybe making the experience more linear might be better to showcase the puzzle design you made. But that’s more so your call!
Overall, nice and cute demo, and I am looking forward to the future of the game!