Initially I wasn't impressed, I didn't realise you could go on the walls, so the additional boxes seemed pointless and felt the lateral movement was too slow. I'm glad I stuck with it and upgraded my sideways movement speed and the point drop rate, the game became a lot more fun. The wall mechanic is nice, though I feel like when you switch, you should also move one space along. I do think the default sideways movement speed should be around level 2 or 3 though as it makes the game a lot more playable and fun. Overall nice concept and well polished.

Feels very polished and well made. Runs flawlessly, sounding and looking great. Congrats.

I would only tweak those controls a notch, so the animation of your box is faster.

This is a nice game in that although it starts from a very basic mechanic, it's well rounded with a sweet UI and some extra features/leveling up concept.

To keep me hooked it would have to play faster/harder or vary its graphics over time.

Reminds me of Atari Tempest. Good job on making this awesome game.
The only thing stopping me was having to move more than one lane sideways. (increased speed helped but I still had to press it twice)

Very nice 80s vibe, definitely good marks for mood.  I know that the skills were meant to offer a progression, but I think I would like some smoother movement up front,  the 'jumping' between rows was a little frustrating at times. 
Some suggestions that I would make (just based on my own preferences)... The collision was a bit too accurate, I think it would be very satisfying and fun to  move to the correct lane and very closely miss a box (like you made it just in time),  but in reality you would always just clip it and end the run.  These near-misses would feel pretty exciting, so allowing the player a bit of an error margin could be good.
The other thing is to have couple of special collectibles, that maybe shot you up onto the ceiling, or jumped a box?  Just to mix up the possible movements you can make.
Overall it is a very nice and polished runner game though, good work.

great game :)

Very enjoyable! I'm impressed a game consisting of nothing but boxes has that much personality. I do feel there should be more of an incentive to go fast ("Rush", if you will). Maybe a score multiplier or something? Slowly moving through the later levels is super tense and fun, but the early levels can get a bit uninteresting once you have a few upgrades.

This is game is awesome! It feels very polished! I have to say I'm a bit jealous :)

Nice endless "runner"! I think you could make the crashes a bit more impactful (screenshake etc.)

Loved the visuals and music, great job on those fronts :)

I felt like the controls could've responded faster though - now there were cases where it felt like there was ample time to get to some wanted point in the game, but the box did not move fast enough. I guess that's design decision though!

Great job overall!

Best game so far in my rating run! Very NICE! Well done! Very polished! 

Would you consider a mobile version? Maybe add leaderboards?