can't save game and if i go to far so i can't kill the others, I have to press Esc and play round 1 again :( - sad
Thanks for playing. Yes there is no replay / restart button in this version. The simplest way to restart a level is to fail the level (get yourself killed). This will then allow you to replay that level. I hope you enjoyed the game apart for that :)
Right click mouse allows to rotate the view and select another enemy. Got stuck like you and I randomly tried other controllers :)