Oh my god there are dozens of ennemies as quick as me spawning from behind and beating me to a pulp!
I would have prefered a very simple intro level with very few slow ennemies so I can make sure I get the controls before the slaughtering happen. So going in that direction I would have made a wave system, so you can start easier and then go crazy and have more and taugher / quicker ennemies.
Love the mood tho. Good job!