Aaaah, there we go. Okay, so the problem was that in my first 5 attempts I was not able to complete the very 1st level.. And in the very first level there are simply no buildings to be built! Ha!
Reason I was not able to beat the level is because I did not understand that my fireballs were actually hitting things as they seemed to randomly evaporate at various different stages of their lifetime.
Managed to get a few levels further this time around until I got beat by a ghost thingy.. boo :D
Thank you for taking the time to explain the predicament and allowing me to take in the full experience. Well done stealthyshoroean! :)