Hi thanks for playing !
About the combat in the walking level, I just uploaded a new version to test with increased range and higher more predictable jumping.
About the car chase, I think I need to zoom out a bit so you have a better view =]
For catching the criminal you have to "ram" the van 3 times, there is a popup that shows up with the instructions when you first see the van. I should probably move that earlier or change it to a paused dialog.
The trap is basically a cheap trick for something I had to do if you reached the end of the level before the bad guy... basically its just an explosion, like the bad guy had somehow setup a trap ahead to blow up the highway. I couldn't think of anything smarter and easier at that point in the jam.
Anyway hope you had fun regardless of the issues.