I think the metaphorical concept of being literally consumed by thoughts being manifest as this huge ball of stuff is pretty neat. I was able to recognize the influence of CBT even before reading the description so it's conveyed well in the game. I do think the execution of the concept does make it a bit more sappy than it has to be.
The raw gameplay itself is pretty dry as all you do is move left and move right but I do like how at the start the glasses are just within reach so the player knows where to go. It was also pretty cool to walk back to where you once were storywise now that the character is bigger. The visuals are pretty neat too. I do think the writing feels a bit sappy though.
In terms of the limitation, the game does remind me of like a reverse katamari damacy where the ball gets smaller and smaller, so it's clear an inanimate object is a huge influence on the game but I do feel like I was playing as the human character.
I really like that you listed the estimated time to complete the game as ten minutes. I think that's a pretty good thing to include.
Thanks for making this game