Hmm, it definitely didn't make the greatest impression on me. The game overall just has an incredible feeling of blandness due to the lackluster graphics and almost complete lack of sound: whereas other games make aspects like jumping and such satisfying through visual effects and sounds, this game had absolutely nothing and therefore felt dull. If the intention was that the game is currently in a prototype/demo state where the graphics are placeholders and the sounds will be added later, than I can understand: just want to point it out nonetheless. The game also felt a bit aimless without any sort of theming or story to prop it up on (though I don't hate games that just cut to the chase and focus on gameplay).
Even if we look past the graphics and sounds such and just focus on raw gameplay, though, I felt like it was compromised due to the wonky controls. While regular jumping and movement seemed alright, it never felt like I could have confidence in my wall jumps, as many of them would not work and give me a much shorter jump than I expected for no reason I could discern, other than the controls being not as forgiving as they should be. This is a critical issue for a challenging platformer as I feel the more challenge there is, the more the controls need to be perfect so to make everything feel fair.
Having said that all that negative stuff, when the game worked and you look past the lackluster graphics and lack of sounds and so on, the game did have some fun obstacle courses to go through that kept getting more and more complex. I easily found myself getting addicted despite it all, so I think there is a lot of promise in its core here: hope the game can get fixed up a bit for full release.