The new respawn system is much more player friendly! Also level 1 is know more interesting with enemies moving to both directions. Still can't beat the second level with following enemies though...
One new bug I noticed is that sometimes the controls lock and the characters just start continuously moving left. (Although, I'm not 100% certain if it's actually a bug in the game because I've also had some problems with my keyboard lately and it might just happen because of that.)