Nice visuals. Controls are snappy and responsive.
Module idea is really nice, but It feels like a lot of modules are bad, defensive and offensive ones occupy the same slot, maybe it's not as bad in co-op, but in single player that just makes defensive modules unusable.
Also having soo few modules really meant that you only stick with one as there's nothing more to try out, once you find the most damage dealing one (melee one) you'll most likely just stick with it.