tomimt: You can download them staright on your device as well.
F1ach: Thanks, didnt realise that, may get Machinarium then, cheers :)
There is the Humble Bundle app, that will allow you (if you give it permission) to use your Humble Bundle login, thus present you with all your android games you bought from them. It will also have a list of unsupported games, though I'm not sure if the games not on the list will be supported by your device.
You can also use the web browser of your phone/tablet to install the games, or you can go the "difficult" way of using your PC.
Also, if you pay more than the average, you don't get just Machinarium, but all 11 (I think) games the bundle currently has, along with steam keys and pc versions of them as well (plus mac and linux).