I believe I played an older demo of this, but this is great!

The players physics is perfect, the difficulty is well balanced, and the level design is solid.

Some minor feedback:

 - when you go to the store, I think your current shard amount should pop up somewhere on the screen. 

- For the map, it would be nice to have markers for rooms with remaining items/secrets, or a way to place custom markers if you see something but can’t reach it yet. Alternatively, an item that can be bought at the store that will reveal rooms with missing secrets/items 

- for the environment art, it feels slightly sparse, maybe some more decorum would make it come alive (I don’t know if you were already planning that)

Great job, I’ll be keeping an eye out for the final release!