Appreciate the feedback, thanks! Did you find the controls agreeable? They've been the biggest source of complaints last time around, I've reworked them since.
Glad you enjoyed the tentacle bit, I plan to do a lot more with them down the line.
Fair point about the visuals, I've largely neglected them in favor of simply adding more stuff. Definitely will need to spend some time on them. By warp effect, do you mean screen warping on time slowdown/damage taken, or when you enter a portal? There aren't really any effects for the latter, yet.
Asteroid gravity has been on my to-experiment-with list for a while now, I'll give it a try, but as for free roaming - not sure I could make it work when so much stuff is already designed around having a limited playable area to catch asteroids in.