Thank you! This is because you're using an older version of Safari.
I'll have a fix for this in 0.5.1, but until then you can try updating Safari and the issue should be solved!
any clue when the 5.1 patch will be
you can nosebug in this game
Play this track(Just press forward and left)
PolyTrack14pdFL3tDCCCGAA9Vy10ldJQADmWzII5yWOZOehD6Ple0Xdufx2urc9ddzRDTlKKesfptGdqLLWVaxYFkIgWPJnHeSG6DyUHuybh4F6e565xfZCYutkhiMwwx5JGHcYBK4WMUnXlbFBEjQlNOwfA3C4ol8Y5Gq3u53hjvfMifDwuSeF77xL5B