hmm, well if you say so... anyways my opinion as a big portal fan is that 22.5 degrees would be the best option to line portals correctly. The ease of use is compromised when you are limited to an 8-directional fire line. It's limitating that you can only shoot portals in that precise range... As pressing the keys *exactly* at the same time is nearly impossible, the portals would be shot on release... Just my PoV... But if you tested and really felt that it's not easy to use then...

It's probably a good idea to wait until the end of the contest to release 1.0.0. This version seems pretty stable and bug-free. Also, I think it's a good idea to make it open source  if you're going to slow down releases... Tilemapping, bidimentional arrays and (who knows) 3d may be features that the open source community can help with if you're short on time.