Love it, donated, and still trying to find a way to make it to round 50 in any of the modes, made it to 39 at best. If anybody has done it, I could use some insight and tips.
If I had to condense my advice into a couple tips, it would be to try to gain as much weight as possible as quickly as possible in the earlier rounds (up to ~20 or so) so you can get as many helpers as you can, then try to keep your weight low with antimatter cakes so you have a better chance at dodging bullets. If I were to recommend a character it would be either Sally or Bella as they have the tightest hitboxes and the best powerup cake-exclusive helpers. Good luck man!