Now imagine that something similar happens to me :) I work on many separate parts of the game, I put them together and from time to time I just play the game and sometimes I giggle. Of course, there are moments when something doesn't feel right, but that's when I can modify it, throw it out or add something to it.
As for the graphics, there are certain things that I would love to change and improve but I don't want to be driven away from the gameplay itself. There is also one important thing to mention here. Every single mesh you see in the game is procedurally generated. This is really important when it comes to the level as it adjusts to the play area. For enemies it allows me making them different. Each one slightly different than another. Right now the differences are not that great but the more elements there will be available to add/alter, the more enemies should differ... while staying recongisable.