Nice and clean, as well as relaxing. I am going for a similar idea and vibe, although I plan to implement many more puzzle types that use a specific image for a real strange place in the world. Here's a link to the in progress creation - I haven't submitted to Brackey's yet, and based on how much more time I can put towards it ( I want to cleanly implement a variety of puzzles for each location ), I may or may not submit to the jam. Well done for your first jam, you still have some time left of course -- Suggestion: Perhaps add a 2nd or 3rd level with more rows/columns and a different picture for each additional level as well perhaps.
https://lostwords.itch.io/strange-places