Understandable. But by releasing the game in its state, alongside Coloratura, Threediopolis, Captain Verdeterre’s Plunder et al… well, the IFComp just was no place for your game. Forget about strict interpretation of the rules and you’ll understand why, just take a look at the other games.
As others said, IntroComp would have been much more fitting. But I’m afraid even then you’d need a bigger hook to get people interested.
Your problem with the creative process is perfectly normal and natural, and there are dime-a-dozen pop remedies for it, and some might even work, it’s something you’ll have to work out for yourself - and I daresay it’s something every author in this forum has contended with at one time or another. You’ll have to find out how to get around it yourself, and I’m sure you will, because you obviously want to very badly.
Keep making games, keep trying, keep sketching out ideas. You might even concentrate on story and puzzles before you start doing all the 3d artwork so that when the blackout strikes you can clear your mind by drawing, and then you might find you start having ideas. Focus more on the game, because in this static environment you’d need spectacular graphics for them to make up for the lack of the rest.
And finally, it would be best for you not to expose yourself to criticism this way by entering the Comp until you have something a bit more solid. If you’d released this on its own it would have attracted less attention, but you’d have had much less grief, and less spiteful reviews.
I still say IntroComp would have been best. All the feedback, none of the pressure.