Credits:

Mateus Reis
--- break.wav (CC-BY-SA 3.0)
--- checkpoint.wav (CC-BY-SA 3.0)
--- jump.wav (CC-BY-SA 3.0)
--- spring.wav (CC-BY-SA 3.0)

Di Rodrigues
--- 1up.ogg (CC-BY-SA 3.0)
--- goal.ogg (CC-BY-SA 3.0)

SilverstepP
--- shield.wav (GPL)
--- acidshield.wav (GPL)
--- fireshield.wav (GPL)
--- thundershield.wav (GPL)
--- watershield.wav (GPL)
--- windshield.wav (GPL)

Alexandre
--- spikes_appearing.wav (CC-BY-SA 3.0)
--- spikes_disappearing.wav (CC-BY-SA 3.0)

The other sound effects were ripped by Kain, Timothy, Water Proof Pop Tart, Stealth and Chaotix Emerald. These were downloaded from http://www.sonicfangameshq.com , http://www.sonicfangameshq.com/sounds.html
