Sounds like you are running out of time. Is this because you are really cautious due to the footsteps? If I do something about the footsteps, would it help?
I tried making attempts but I failed with the footsteps. In result I fixed a bug that stopped it from making slightly different footstep sounds. Also now all predators can be selected. This might cause more frustration though since the ones further to the right are more difficult.
