Open the console with F12 and enter the following command:
var r = cr_getC2Runtime();
Then enter this command to unlock all levels:
all_global_vars[7].data=15;
Incase the above command does not work for you, use
r.all_global_vars[7].data=15;
instead
Launch all levels, and touch the algae (level 1), a floating skull (level 2), a fast fish (level 3), and a red skull (level 4). ~1 minute to 100%.
