Really love the game. I know it's just a demo, so I'm giving feedback on what I noticed during my gameplay.
W̶a̶l̶l̶ ̶j̶u̶m̶p̶s̶ ̶ ̶f̶e̶l̶l̶s̶ ̶w̶r̶o̶n̶g̶,̶ ̶i̶t̶ ̶f̶e̶e̶l̶s̶ ̶l̶i̶k̶e̶ ̶y̶o̶u̶ ̶w̶e̶r̶e̶n̶'̶t̶ ̶s̶u̶p̶p̶o̶s̶e̶d̶ ̶t̶o̶ ̶b̶e̶ ̶a̶b̶l̶e̶ ̶t̶o̶ ̶d̶o̶ ̶a̶ ̶w̶a̶l̶l̶ ̶j̶u̶m̶p̶ ̶w̶i̶t̶h̶ ̶o̶n̶l̶y̶ ̶o̶n̶e̶ ̶w̶a̶l̶l̶,̶ ̶i̶t̶ ̶i̶s̶ ̶h̶a̶r̶d̶ ̶t̶o̶ ̶t̶i̶m̶e̶ ̶t̶h̶e̶ ̶i̶n̶p̶u̶t̶ ̶t̶o̶ ̶b̶o̶u̶n̶c̶e̶ ̶o̶f̶ ̶t̶h̶e̶ ̶w̶a̶l̶l̶,̶ ̶b̶e̶c̶a̶u̶s̶e̶ ̶i̶f̶ ̶y̶o̶u̶ ̶a̶r̶e̶ ̶t̶o̶o̶ ̶e̶a̶r̶l̶y̶ ̶i̶t̶ ̶w̶i̶l̶l̶ ̶e̶a̶t̶ ̶y̶o̶u̶r̶ ̶i̶n̶p̶u̶t̶ ̶a̶n̶d̶ ̶y̶o̶u̶ ̶w̶i̶l̶l̶ ̶b̶e̶ ̶u̶n̶a̶b̶l̶e̶ ̶t̶o̶ ̶j̶u̶m̶p̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶w̶a̶l̶l̶ ̶f̶o̶r̶ ̶a̶ ̶w̶h̶i̶l̶e̶,̶ ̶a̶n̶d̶ ̶i̶f̶ ̶y̶o̶u̶ ̶t̶o̶o̶ ̶l̶a̶t̶e̶ ̶y̶o̶u̶ ̶w̶i̶l̶l̶ ̶b̶o̶u̶n̶c̶e̶ ̶b̶a̶c̶k̶ ̶b̶u̶t̶ ̶y̶o̶u̶ ̶w̶o̶n̶'̶t̶ ̶g̶a̶i̶n̶ ̶a̶n̶y̶ ̶h̶e̶i̶g̶h̶t̶ ̶.̶ ̶ ̶(̶J̶u̶s̶t̶ ̶r̶e̶a̶d̶ ̶i̶n̶ ̶t̶h̶e̶ ̶c̶o̶m̶m̶e̶n̶t̶s̶ ̶i̶t̶ ̶i̶s̶ ̶i̶n̶t̶e̶n̶t̶i̶o̶n̶a̶l̶,̶ ̶b̶u̶t̶ ̶I̶ ̶d̶o̶n̶'̶t̶ ̶t̶h̶i̶n̶k̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶f̶o̶r̶m̶ ̶-̶ ̶y̶o̶u̶ ̶c̶a̶n̶ ̶j̶u̶s̶t̶ ̶h̶o̶l̶d̶ ̶A̶ ̶o̶r̶ ̶D̶ ̶a̶n̶d̶ ̶t̶i̶m̶e̶ ̶y̶o̶u̶r̶ ̶j̶u̶m̶p̶s̶,̶ ̶a̶n̶d̶ ̶i̶f̶ ̶i̶t̶ ̶s̶t̶i̶l̶l̶ ̶i̶s̶ ̶j̶u̶s̶t̶ ̶l̶i̶k̶e̶ ̶y̶o̶u̶ ̶i̶n̶t̶e̶n̶d̶e̶d̶,̶ ̶t̶h̶e̶n̶ ̶I̶ ̶t̶h̶i̶n̶k̶ ̶y̶o̶u̶ ̶s̶h̶o̶u̶l̶d̶ ̶r̶e̶a̶l̶l̶y̶ ̶p̶o̶l̶i̶s̶h̶ ̶t̶h̶i̶s̶ ̶m̶e̶c̶h̶a̶n̶i̶c̶,̶ ̶b̶e̶c̶a̶u̶s̶e̶ ̶i̶t̶ ̶j̶u̶s̶t̶ ̶f̶e̶e̶l̶ ̶b̶a̶d̶ ̶t̶o̶ ̶e̶x̶e̶c̶u̶t̶e̶ ̶-̶ ̶f̶o̶r̶ ̶m̶e̶ ̶i̶t̶ ̶s̶h̶o̶u̶l̶d̶ ̶b̶e̶:̶ ̶y̶o̶u̶ ̶j̶u̶s̶t̶ ̶c̶a̶n̶ ̶n̶o̶r̶m̶a̶l̶l̶y̶ ̶w̶a̶l̶l̶ ̶j̶u̶m̶p̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶s̶a̶m̶e̶ ̶w̶a̶l̶l̶ ̶a̶n̶d̶ ̶g̶a̶i̶n̶ ̶a̶ ̶m̶o̶d̶e̶r̶a̶t̶e̶ ̶h̶e̶i̶g̶h̶t̶ ̶o̶r̶ ̶y̶o̶u̶ ̶j̶u̶s̶t̶ ̶c̶a̶n̶'̶t̶)̶
Just understood how the are supposed to work, so never mind this above, but you should still do something about the wrong way to do them - holding A or D and timing your jumps, just make it impossible to do it that way so people don't waste half an hour like me to try climb walls, because it feels like it just was supposed to be hard to climb and it is possible that way.
There should be some indication you touched the ground, as you don't really know when you can start another dash-slide-jump combo and you often just dash, because you are in the air and cannot slide and it kills your momentum.
When you dash off a platform you are powerless to do anything, I think you could try giving a 1 frame timing (with buffered jump during the dash) to jump even when not being on the ground. #Played some more and I really despise this.
You don't have to touch to wall to fall slower.
Quality of life - You could make the mouse vanish when you touch the keyboard so it isn't visible on the screen as you don't use it and you don't need it.
Probably Bugs:
It doesn't register your position is eligible for a wall jump when you touch the bottom corners of the wall.
When you spam the dash button really fast, sometimes you can enter a strange state in which you are sliding without pressing the slide button, you cannot dash, and you can exit this state by jumping or pressing the slide button and it will un-slide you.
When you try to dash and jump at the same time (probably frame perfect) or with slight delay (2 consecutive frames or something similar) strange round particles start coming off you and you are unable to do anything (jump, dash, slide), you can unstuck yourself by resetting (r), dying or falling of the edge (probably it just needs to register that you touched to ground).
When you try jumping during the dash it will make you unable to slide after you exit the dash animation killing you momentum and destroying the dash-slide-jump combo, as you won't jump because it doesn't buffer your jumps during the dash and you won't slide because of the bug. #This too
Sorry for English btw