I saw someone else complain about low resolution. I can't recall if they got a response but I did notice that there are resolution options in the menu.

The full menu, including options for saving the project, are in the "menu button" of the phone, and not so easily found through the app.

particle generators .... hmm .... I've not had one on my phone for many moons.

I have one on my desktop that I love. Amberlight.