What an amazing map! The architecture is really well done! Hangar, warehouse, control rooms, canteen, etc... So much stuff to see, chock full of details and doom cute!
And while the fights aren't very difficult, they are fun and you better pay attention to your surroundings.
Some of the secrets are easy to spot, others not so much.
I spent around 15 minutes on my first playthrough looking for that final secret (the bathroom one).
Also, I didn't encounter anything that I'd consider broken or strange, maybe a little HOM here and there (Played on DSDA).