Fun little mini-metroid platformer! At its core, I liked the game's traversal techniques in being able to attach to the wall and jump all over the place. Story was a little goofy, but hey, I'll collect all the coffee the little dude wants since it's so fun to move around these challenging levels. I also like how the game keeps enhancing the traversal techniques constantly to keep things exciting: first you're just moving around, then there are buttons, then timed buttons, keys, hovering, hover platforms, hover pinball thingies, hover rails, and so on, it never gets boring!
Getting used to the controls was a bit tricky at first: for example, I didn't expect pressing up when you're attached on a wall to detach you from the wall, as I thought it would just make you climb up and stay attached. This issue had a knock-on effect of screwing over wall jumps if you move up, and then quickly press up+left expecting to wall jump, but you won't, since you're technically airborne. Was a bit weird that you couldn't press down to detach from a wall, or to climb down it either. The game also had some problems with unclear boundaries: most of the time you can clearly see a wall denoting a boundary, but there were a ton of places where it looks like it's an open boundary where you can move to transition to the next screen, but nope, there's a wall there just out of visible range blocking you! Bit confusing, that.
Only real problem I have with the game is that I quite liked it, but it doesn't seem to have a save feature: maybe it's not that long in total, but I felt it was still long enough to justify a continue option. Well, I'll try and come back to finish it at some point!