Slotomania won't load keep getting spinning circle

Quit certain applications and see if that helps it to load efficiently.
Always get it scanned by doing Scan Disk and Defragmenter. Other software such as Norton 360 will do the trick to keep your system in top performance. Clear the cache from the internet explorer and make sure you have the anti-virus and firewall software up-to-date.
If that doesn't do the trick here's one more idea. Purchase an external hard drive enclosure it will allow you to just move the hard drive from the system if you don't prying hands around your system. This way you can play the game when you insert the USB cable and turn it on or if you want to install it internally then you do so by just opening the system case, finding an available SATA cable and power cable and drive bay for the hard drive. You install it and you can use this for your games and applications only.
It's separated from the main Windows hard drive but it will work as long as you can install Slotomania on another hard drive. I have the same thing for my games. A whole hard drive dedicated to games only. Some things are better to be on another hard drive then the system hard drive. If you get a 500 GB or 1 TB WD SATA, connected to the system and partitioned and install that inside then you can just reinstall the software in that. You can partition it to 116GB each and use it to basically run games on partition and the rest for applications and programs.