Adjusting game hardness

This is just a small update, where I adjusted the walking speed and running speed of the enemy creature for the three game modes. Like in the last update, it's now a little bit slower. I hope you guys will find this game hardness after this tiny nudge a more fair! 

As always, I'd love to hear what you think. :) Sometimes it's difficult for me to gather informations on whether you found a change helpful or not. Cheers!