Hi,
first, it would probably be a good idea for you to create a site for founders with a standardized bug-report.
now to the first short feedback/bugreport:
Bugs:
- randomly planets that show up to be colonizable can not be colonized - this goes for player and ai (it actually is almost funny to see the ai get stuck)
- on several occasions planet-improvements could not be built because on selecting anything the selected field was moved to an already occupied field. leaving 2-5 free fields actually barred from being built upon.
feedback:
- build-list: the pictures of ships are nice but they are confusing. if you select a unique building directly above the first ship the sip-picture pops up after setting the build-queue. this is confusing as there is no close-button either. my first reaction was hitting esc which closes the planet-management entirely. as this happened several times i guess this might be an area to improve upon 
- while it was pretty annoying in GC2 to have the camera hop from ship to ship it would be nice to have an option to follow the movement of the selected ship/fleet.
- please add an auto-upgrade option to facilities asap.
note: fine graphics so far, i like it, a bit more glow on the stars and variation on the planets would be nice thogh. overall, for an alpha really decent state of things.