Keep the information in mind that I could only run it at 2 fps with my crappy windows computer
1. I think the hectic element is balanced, but the saturn tower is of course very powerful. And from what I can tell, the stardust for completing the level and upgrading the towers feels alright
2. No current solid ideas, but a way to push back enemies might be a good tower to have
3. At the moment, I wish there was a way to carry more than one piece of stardust, carrying only one at a time felt a bit tedious
4. As far as different land types go, it would be interesting to see like a mud floor that slows your walking speed, as getting to places quickly is quite important here.
5. The flow of the game is definitely smooth, but it was a little bit unclear on how to interact with things at first. The biggest trouble I had was actually trying to get the stardust into places, I'd accidentally move too far into the box/black hole and throw the stardust past it.
6. Showing on the UI what buttons you need to press for things to happen is very useful, If I didn't know that E was a common interact button among games, I wouldn't have known what to do with things unless I checked that actual game page.
7. I'm not sure of any additional behaviors, but something that might be interesting is if certain enemies had effects on you as you moved near them, slowdown, drawing you in, pushing you away, etc. might be interesting since movement is so important to getting things done.
8. I don't think I found any specific strategies other than calculating where the optimal points to put the saturn towers based on area of effect on a grid based system.
Add: I actually had a lot of trouble getting up the stairs in level 2, and I don't know if this is a bug caused by my laggy computer, or if it is an actual bug.