I got a bit bored of the game after the first couple of hours, but once you figured things out and start unlocking more gear, there's quite a bit of depth to it.
Getting down to Nebula depth 4+ and the enemies become much more difficult. Screws in particularly you need to either avoid or distract/zap. Pay attention to where the nearest ship with a med bay is, but don't forget you can spend food to rest and heal.
Bit annoying when you find a ship with some critical parts on it, but some doors are completely blocked by fire though