Thank you for this review. My high score is 156 ;) and from there it's impossible with the current state of the game. I plan on making a full version of this with upgrades and stuff on mobile, I just need to find a way to finance the mobile license. So yes for now it's endless. Everything in the game have been made from scratch and yes it's very satisfying to do everything on my own. As you see the only sprites I've used are body parts then coded the rotation on them to do animations, which is why the game is only 3MB.
I will most likely do a tutorial on how to be efficient in creating your own stuff in a small amount of time,
Stay tune!