I created à FLAPPY game ,the game lag when it show defeate animation , the game lag, it's not always but 2 Times on 10. I usé 60 images per sec for animations.
Try reducing the number of frames. I would cut it to 15 frames per second at least and just reduce the speed of the animation.
I think bb2.2.0 and bb2.2.1 caused this lag because with bb2.1.1 i never faced to this bug . 4 of m'y .bbdoc's are corrupted due to this updated . Bb 2.1.1 is nearly 250mb and bb 2.2.1 is nearly 50mb , this can be the cause ?
The size difference is only due to the export modules being downloaded after install. Email support@buildbox.com about your issues. Please include full details and example BBDOCs so that we can help your properly.