To install .IPA files on iOS, you'll either need a computer, for all versions, or a jailbroken device, which is only a few iOS versions.
The computer version requires the use of a program called Altstore.
After you have Altstore on your iOS device you just simple need the .IPA file on your phone. However, there is no .IPA file online for BlocksWorld, and the one provided on your website is encrypted.
So, is there a way you can get contact of the publisher of that .IPA and ask him to run it over an unencrypting program? It can only be done by him since he has the device the .IPA file was pulled from.