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You can download the game and play it. Search for "DoctorQwack obliterate everything 3" and you should be able to find it easily. I'm not sure if Kong permits posting of other sites, otherwise I'd just post that. But it's easy to find & play offline
Old game, so there's some compatibility issues with Flash-clones obviously. Pretty fun & challenging though. Took about 2 months of casual play to beat level 50 boss.
If you get stuck on a boss, restart the level and see if you get an easier boss next time. After level 40 I was doing most levels twice. Maybe that's helpful good luck!
You can download this game thanks to DoctorQwack if you want to play it. Do a search for obliterate everything 3 and you should be able to find it easily.
I got it a month ago and it's been fun, especially after level 30. Hoping to make it to 100 =)
 "Obliterate Everything 3"){kind=icon}