Bit of a mixed bag for me: felt like it had a lot of potential in some respects, but didn't make the most of it.
For something that looks very low effort, I felt like it has a lot of nice little touches in there, such as being able to fire each gun in the dual wield independently, being able to be noticed for staring at cock, some funny signs and voice samples, and a really clever puzzle level where you need to jump up on Ben Stiller to go out of bounds and find the key. All in all I feel like it could be a fun little adventure with each level having its own theme and puzzle to it.
But that's just it: I felt like there was only one really clever level in there that tried to do something interesting, while a vast majority of the levels were just the same thing but with a different paint job: wander around and click E on everything till you win. There was an attempt at having some variety: finding the android phone in a sea of iphones was a fun modern take on the "needle in a haystack" dilemma, and yes, some of the ways the E interact levels did differ were funny despite it, but it was just really minor stuff with no challenge to it. I actually made the lust level a lot more fun for me by jumping from bed to bed and treating the floor as lava: why couldn't the game do something like that instead of me having to invent my own fun? I was also disappointed that there wasn't more humor in there: just having Ben Stiller be a character isn't a joke, and while you're at it, c'mon, at least throw some voice lines in there, I liked him in Royal Tenebaums! Also how, how could you miss not coding the game to recognize the possibility of shooting Ben Stiller as an easter egg in the gun level, c'mon (yes I played the game twice to verify that)!
Anyway, I do hope that this does serve as a learning process and you can make an FPS in the future like you mention, haha.