The endless running mechanic was a bit more annoying than helpful, but i suppose since its the core mechanic you didnt want it to be easy. I had issues getting "stuck" (sorta) in sports where i would be jumping back and forth endlessly and not able to progress. Specifically the first briefcase area. music was prety good, reminded me of Sonic 3, a good thing. Seems to be heading in the right direction, a few tweaks here and there, and it could potentially be a really enjoyable game. for now, the endless running is a bit much IMO
The graffiti on the wall gives tips like click and hold 2 release. Perhaps you missed that or just is not clear. It's click 2 jump, climb, etc... and click & hold 2 release the wall, drop weapons etc.