Use the arrow keys to move (only right and up will work - you can't go backwards) Unlike Sonic the Hedgehog if you fall into the void you will go back to the start of the entire thing - no matter if you have rings or not.
When you touch spikes, your ring total will go down to zero - and after a few seconds if you are still on spikes then you will have to start again (GAME OVER) Hope you like it!