Concept : Pretty good.
Implementation : Not great.
Engrish : Grade 2 Special Ed.
First and foremost, dev, if you read this, you are in desperate need of a proofreader. I don't know if this is a case of a non-English speaker or something else, but you can't type or spell for shit.
The sandbox is one of the more annoying and clunky types out there. There's no clear indication of where to go. For example; when you have to "Find Finn" I ended up going through every fucking room back in the HQ (several times in some cases because it isn't immediately obvious what leads where) only to figure out I left his retarded ass back in the shopping center. Now, admittedly, that was my bad, but I honestly blame the fucking awful English since it caused me to just text-skip through all the dialogue after a certain point.
And of course once I found him I got treated to a musical "action sequence" where some Arabic (I assume) Deadpool knockoff shows up and runs people over with a tuk-tuk.
All that aside, the concept / plot has potential. Assuming you don't get hit with a Cease and Desist order from WB / DC.