I Have to agree with ghostface
The collision detection was terrible in this game. I found myself being able to hang on to walls and cornersjust by running at them and still being able to jump. I pretty sure you made it so we dont hit platforms above us which is good.
Another note on the collision detection is there have numerous occasions where I could just hit the spikes and not die if I jumped soon enough.
I found another glitch to stay partially visible, if you hit an orb to become visible, just when you start to go invisible if you collect another orb at just the right time you will be able to partially see yourself. I tested it about 6 times and it happened about 2-3 times.
Next off the controls are not that horrible, they are okay but the motion of how the guy moves makes it feel terrible.
Another note, although the levels are simple they feel crammed. If you make a 2nd one, make the guy alittle smaller like, I would say about half as big so you can make bigger and possible more complex levels.
And finally, The game seems alittle too simple as there is nothing to gain throughout the levels besides orbs, maybe some powerups would be nice or possibly coins to collect that could be used to buy things to like increase visibility time,and other bonuses.