Sam Van Hallgren’s review published on Letterboxd:
I suppose there will be no way to tell - at least for a while - but I'd be willing to bet that this is the movie that haunts my children the longest. At nearly 5 and 2, they stuck with the surreal and often jarring animation for the duration. But those Blue Meanies may cost me a fortune in psychiatric bills down the line. Worth noting that they've been listening to little else but the Yellow Submarine sound track for the past 4 weeks, so they could always count on a familiar tune if things ever got too unnerving.
As for me, I genuinely enjoyed the originality of the animation. The When I'm 64 and Lucy in the Sky of Diamonds sequences were especially inspired.