Thank you so so much for your kind words, it really means a lot to know how much you loved the game. I'm most certainly already brainstorming how to expand upon the concept in a big way, and I really hope I can make something truly special out of it. Hearing you have faith it could be is extremely inspiring :)
And about the jittering, heart movement is currently tied to framerate, so any fluctuations in that would make them behave slighlty jankier than intended, and since it's Unreal the performace is naturally not very smooth. Will definitely look into fixing these little things as I go along.
Thank you so much again for your comments <3