Other than the slopes, physics seem slightly off.. and I'm assuming that's what this beta is showcasing?
I would assume there would be more scenery.. If it's in cyberspace, some bg and such.
So I guess I'll critique physics
There is the slope issue
'a'jumps are a little too fast..
At full jump and then release, the first jump should compress the ball.. but the second bounce should be a solid ball in my opinion
Also, you have a few stray pixels that the ball reacts with. Therefore I'm assuming there isn't a solid layer mask, and that the blue grid is actually the solid layer.. Which is probably what causes the slope issue.
I will forever love you if you finish it