Not bad. The jumping and control is actually pretty smooth in spite of the rotating play area. I wasn't really sure how that would work, but it does.
I had some issues with the controls though. One level was a bit tricky because my keyboard doesn't seem to allow up, right, and space to all be hit at the same time. But I will say the controls were responsive enough that I could move between moving and jumping well enough to work around that.
And I gave up when the bubble gun came into play because my laptop has a built-in delay between keyboard and trackpad input to avoid accidental taps, making the bubble gun a bit impractical to use on my setup. Almost was able to play it with a gamepad - directions and jump worked amazingly fluidly, but there was no button for the gun.