Reached wave 6. I have no video since my laptop has issues recording chrome windows.
First I tried playing with the mouse. I felt drunk. I believe the bat's movement is decided by the position of the cursor on the screen instead of its speed/aceleration, since leaving the mouse still made the bat fly erratically. Doing sharp turns was almost impossible too, since that meant losing control. I managed to touch one person with it though, nice wilhelm scream.
Then I tried keyboard and things went much much smoother. Catching people became a lot easier and I was consistenly able to adjust my trajectory and suck blood. I lost thanks to doing risky manouvers and crashing on the floor and buildings. It was a nice run though and the game run well on my machine.
Finally the thumbnail has anime girl vampires. Where are the anime girl vampires?