The tutorial was way too wordy... well, I skipped it halfway.
I still have no idea what "T" means, but I was hooked! The user interface is really easy to use, game mechanics were simple but addictive. The level is really simple but short enough to be entertaining until the end.
It also feels way more polished when playing than what the screenshot showed.
It would benefit from a few visuals effects here and there, and most importantly a shorter tutorial. To avoid the "text dump" effect, you could display tooltips or add something to the UI which says what means what, what is produced and needed, etc. during the game instead of before. The mechanics are pretty intuitive (at least for me), so explanations shouldn't be forced on the player.
"Toot toot"!