I couldn't figure out how to reliably use or move items.
This lack of understanding of the core mechanic made my experience feel frustrating.
I lost once, and I "won" once (with zero score?); but both felt like random chance.
Trying to figure out what an item is, while trying to figure out what to move, where to move it, while stuff is constantly popping into the bag in random spots, and *something* important is happening off the right as the player moves (no time to look closely) - it's just too much all at once.
Given how fast paced the movement is, I think it would be better to just let a single click on an item in the bag be the action for using the item.
If all items can be used easily, then the focus is on figuring out (quickly) which item to use when; and, if that's all you need to, the game becomes a lot more manageable.