haha this sounds really interest. these two types of games are really perfect to make for this jam and it would be cool as a reach goal to see how much you could kind of play with the design formulas. since flappy bird is typically a short sometimes seconds-long game and shmups tend to be a little longer, maybe you could figure out a way to make the flappy bird part of the design less frustrating (say, maybe less pipes)? either way, looking forward to seeing where this goes!