Enjoyable. Kept me going until (I believe) I did everything I could in this version.
Something I didn't really understand: Tiles sometimes have a red border around them. I was guessing this meant that their requirements were no longer being met, but I couldn't really tell. I also wasn't sure what the impact of that would be.
I was also a little confused when I'd make a new tile, and not see the use for it. I expect this means it's a dependency of something I haven't yet unlocked, but it might be nice to get some hint in the description. Something like: Require By: X, Y, Z. Or "Required by: Unknown" if you haven't discovered that thing yet.
Overall, I didn't have any real sense of whether I was doing well, or just doing things. Not sure if there's an ultimate goal. Aiming for a high score? Aiming at completely unlocking everything?