I liked your "Crash" game, although not unique I find that concept very interesting.
I have one question though. How come I verify result of your games?
It seems impossible to tell whether they are provably fair or not.
Another thing, please allow users to change denomination of BTC. Micro BTC might be confusing for some people.
Thank you for your question.
All three games are provably fair.
To check: on Crash game you have the HISTORY tab where you can find each round ID.
Click on the ID you want and then click VERIFY.