One of the best game i played so far! I like Tower Defense Games a lot and this new feature of needing to connect everything and the machanic to "upgrade" the towers is something i want more of! (Really! Pls make out of this a full game with more towers, levels and enemys).
The only thing i have to say is that in the beginning i needed a few minutes to fully understand how the towers/conectthing works.
Overall a really great game!