Forced Intergalactic Harmony
I enjoyed all that you have so far, with this one following--to a lesser degree--the original's arthouse feel, that I deem to be the greatest in the series. All the other sequels seemed to have lost the 'tactile' image of the main character. This is WRONG, and is integral to the appeal of this work, in my oppinion. Artwork aside, I'm not sure if this is a 'redux' of the original, and if it is..then the concept of destroying one's home planet, (which seemed dull to the inhabitant) in order to find love in another being seems lost; and is the main driving point behind your first episode's appeal, in my oppinion.
I love flashes on this site that aren't pop-culture related, or random comedy-driven... and so your series of flash are sights for these sore eyes. Oh, and if you continue use actual voice-acting, like the cliffhanger of Ch.3 suggests, then please try and do so without any cheesiness, as this precedent you've made (with your animations following, brilliantly with the soundtrack.) could be marred by anything less-than-spectacular.
Those are suggestions, and I know you will do what is best for the Planetoid. Take care.