Altogether a very good package. Really nice art and music, lovely animation, clever level design.
Slightly frustrating at times, but fun from start to finish. I particularly like the "toll gate" mechanic--it forces you not to merely avoid coins, but to strategically collect the minimum number.
One suggestion if you were to develop this game further: you might want to implement some kind of reward for finishing a level with more coins. This adds further tension to the risk/reward analysis.