Haha dont worry, I made you read a lot of text, now its my turn :D
Anyways really great feedback! Yes the menu bug is indeed due to the first lag spike, it seems to be fixed by just flipping through the page until it resets at page 0 again though.
As for the game, yes you indeed have to make it balanced, unfortunately the only menu i have to show that is within the console, underneath the "tower health" section that there is listed all the reasons for why you mightve "resetted the game timer", basically the tower can't be too op and also can't be too weak.
Btw yep lower fire rate, health regen, and spawn rate, would make them faster,i tried to highlight these in the "fake comments" within the flavour code text under them but seems its still too vague.
Anyways if you ever needed anything in more detail, i had overhauled the game page last night to include an in detail table of every common misconception :D no worries though if you don't wanna check it out. Glad you liked the game at least!