There's some ambiance to that tiny world indeed.
The layering of blurs, shadows, lights is pretty well down, and it seems to serve the level design.
I spent a few tries dying on spikes first before accidentaly falling on one of the orbs to collect.
From the moment I had the orb, the game made sense.
I'm not a big fan of the control that make it so that you jump up right/left from a wall if you were slowly sliding down along it.
It doesn't feel very expected and caused me some stupid deaths. (I'd expect to move out from the wall, but on the same Y, to prevent reaching top rotating spikes for examples).
The down sliding might also be a bit more accelerated to prevent that, the player would be less enclined to jump of the wall at a not opportune time.
Nice work though considered in the frame of ludum dare <img src="smileys/smiley1.gif" border="0" align="middle">
With more time available a correction on the control bugs (sometimes, the sprite is mirroring/not mirroring at high pace if colliding with an angle of the scenery/wall) it will make for a cool little game to have a quick play with.
And thanks for your feedback on Out for arrest.
EDIT: Congrats on the cool votes in the ludum dare. You're like in the top 10 on coolness !
Good for C2 and deserved for you !
EDIT2: After having replayed and finished it, I'll come back on my comment about the controls.
Still I feel there's something "not natural" I can't put words on it, but I tended to play "stuck to the wall", holding the down key often when on walls to try to see what was coming up or down.
The speed of the slide down should be tweaked to get something more nervous maybe.
Also there's some kind of collision bug when touching the angle of a wall and holding the down key. That's where the fussy mirroring I was talking about happen.
Once you get the hang of the controls, the first two orbs are easy to get (those from the bottom and right section of the level).
The last orb (after the platform) was a bit trickier to get. The level design had me used to some "circular path" from the volcanoes to the orb/back to the volcanoes and the last orb didn't fit that pattern <img src="smileys/smiley4.gif" border="0" align="middle">
I died, but fortunately the two previous orbs were still in place in the volcanoes. GLAD !
The first time I had played, death meant restarting the whole level again. And it caused quite a fast/frustrated quick as I was still working on my own entry for the jam.
Again, good job.