In Tutorial 3 the crate just fell through the ground and then there is the tutorial panel telling the players about how you can pull in enemies but there was no enemy :D
I didn't finish the game yet, but I play a bit more tomorrow. So far the only other issue was the music. It seems like when you quit the level and go back to the main menu you restart the main menu music again so now two musics are playing. If you do this again another music is playing of top of it. It gets quite noisy after a a couple of quits.
If I find more I'll post it here.