I played your Alpha and would like to note a few things:
* Walking down and up stairs causes collision problems.
* There is no kill zone (or if you aren't going for that when I fell off the ship there was no way to get back onto the ship).
* Enemies swarm the player way to quickly for a player to be able to take care of them as the animation for the attacks on the player character is delayed and doesn't feel fun to use.
I do get that it is an Alpha Build and for 5 weeks so far it is a decent build although I do believe that it is better to get the player character feel down and working to the best possible point and I think fixing the above things I've mentioned will help a lot to make the game better.
Good Luck with the rest of Development I wish you all the Best!