The game loads a lot of HD pictures + the ads. Possible reductions from
- reduce Flash quality - try "low", usually "medium",
- be sure NOT to clear caches when shutting down the browser (=> browser settings) - it would mean to reload items which would be there normally,
- set both browser and Flash caches to high storage capacity.
- play less, abort single play games which have no relevance to you,
- avoid multiplayer games which require extra loading for all the shots of the other players.
(? use an ad blocker; alas, I don't know if loading will be reduced or only display is affected)