Hey, I'll go ahead an write a short FAQ, as there seems to be a lot of complaints that can be fixed.
Game to easy? - Try turning up the dificulty level.
Game to loud? - Try going to the options menu and turning down the volume.
Not getting units fast enough/to fast? - Try going to the options menu and changing the "set delay" option.
Getting to much lag? - Try going to options and turning down the graphic quality.
Really nice, especially considering it's your first game. If you wanted to expand it, I would suggest adding difficulty levels (maybe a number of lives and bowsers?). And, of course, hi scores =D
FockerSRNA, same thing happened to me, just walk to the left until you find him.
Great game, but the 3-3 boss kick-spam is NOT COOL (yes, I am mad a tactic I use all the time is used against me xD)