Hey, I played your game for a bit and here is my feedback...
- great concept and vibe
- good music, very cool there is a built in music player
- nice html game system, lots of great css touches
- i like how the little ufo comes by to steal stuff
- the matching icons could be more distinctive and interesting. maybe create custom images
- this is a lot of info to put on the main screen, it might be good to condense what you have here so player isn't overwhelmed
- it is really cool that all these icons have their own actions but it seems like a lot to start out with. maybe would make more sense to have the majority be neutral colors without an emoji on top like they don't have a side effect just points. then as you get farther in the game it unlocks new special tiles that sometimes appear. like maybe each universe the player has a option to select from 3 special tiles to add to the pool.
- being able to swap any 2 tiles seems too easy, at first i thought only neighboring tiles could be swapped. so I am pretty much just matching the first thing i see as fast as I can to progress without thinking about strategy
Great work overall! it feels very clean and professional already, and all the mechanics are there, just needs some game design work to tweak what you have.