You're not the only one, I also face long loading times, sorry about it. :(
I think the game is just too big.
My most loved tower defense game returns on itch.io! Play it now!!!
https://samadibeligaswatte1.itch.io/bloons-tower-defense-3
Screenshots:
Haha no worries. XD
I know some sites are working on bringing the games without flash although some features are locked because you have to play the game on Kongregate (which doesn't work sadly):
Learn to Fly 1: https://sites.google.com/site/thegamecompilation/learn-to-fly
Learn to Fly 2: https://sites.google.com/site/classroom6x/learn-to-fly-2