It's simple 😉. Do not use flash. Flash is going away. Flash isn't supported on mobile devices. Use HTML 5.
Steve Jobs wrote "Thoughts on Flash"
http://www.apple.com/hotnews/thoughts-on-flash/
In the meantime, your users should try another browser.
Try another web browser.
Top 4 browsers support flash player on iPad and iPhone
http://mashtips.com/flash-player-ios/
Puffin
"Puffin Web Browser is a wicked fast Mobile Flash Browser. Once users experience the thrilling speed of Puffin, regular mobile Internet feels like torture. Puffin Free is the free version of the Puffin family and supports Adobe Flash over cloud during "off-peak hours" from 8AM to 4PM (subject to change without prior notice)"
Free:
https://itunes.apple.com/us/app/puffin-web-browser-free/id472937654?mt=8
Paid:
https://itunes.apple.com/us/app/puffin-web-browser/id406239138?mt=8
"Photon Flash Web Browser App- Tabbed and Full Screen Anonymous Private Browsing plus Flash Player downloader for free video, games, music & news download on iPad with Remote Cloud Browse Desktop
By Appsverse Inc."
http://itunes.apple.com/ca/app/photon-flash-web-browser-app/id430200224?mt=8
for video only support try, SkyFire:
http://itunes.apple.com/us/app/skyfire-web-browser-for-ipad/id409153623?mt=8
Server based games. I've never tried it, but they do have a 30minute free trial. See what happens when experimenting with iSwifter:
http://itunes.apple.com/us/app/iswifter/id388857173?mt=8
in the second post, Texas Mac Man discusses flash alternatives:
https://discussions.apple.com/thread/5749246?tstart=0