(UPDATE) I've developed a game of my own! Care to check it out?

[Hoeloe]

It is very, very easy to make in flash, but I don't know what you used to make this.

Actually proper pausing in Flash is harder than with a more professional system, because it keeps update and draw strictly separate, meaning that it's awkward to make any animations stop (which can be done by halting an update cycle with other tools, if it's set up correctly). Still, it's not difficult to do.