Hi, thanks a lot! Glad you like it!
Yeah the style is pretty much a taste thing. Initially I did want to do a more high-end, textured look, but found the "placeholders" to have their own charme in their simplicity :)
Music and sounds are among the next things I hope to add soon, stay tuned :P
Yeah, performance optimization will definitely come sooner or later, probably when I transition to beta. But thanks for the feedback, on my machines its mostly no issue.
Level editor and zooming might or might not be on the way ;)
The "economy" part is simply the theme / setting. You are correct, it is a pure puzzler :o)
Thanks a lot for your feedback, I appreciate it!