I'm wonder how I would keep time on how long you're playing the level. Take this for example from Sonic 1:
<img src="http://imageshack.com/a/img69/2071/qmuj.jpg" border="0" />
And how would I make the score add up to how long you've been playing and how many rings you have at the end? Like this:
<img src="http://www.soniczone0.com/games/sonic2/gameplay/s2-gameplay-basicsimg11.png" border="0" />