Hey, This was my first time playing Sipho. I tested on Linux.
I always say best part of Spore was the cell stage, and it looks like your game is like that, but much better.
At first I accidentally played the aquarium mode, and I thought that was the whole DD content, which is why I was given all the sandbox options (which I did not use).
I built this thing:
it always felt like the movement was too slow for me.
here are the aquarium stats
All that aquarium was done in one sitting.
I came back to your game the day after because I really got into it and wanted to try out building something different, and I found out there is an actual campaign.
As I was playing I found out there are bosses in the game. I think it's great.
One bug I experienced while fighting one boss was:
and sometimes orbs wouldn't get collected when my mosters mouth was shaped like a half moon, but it's not that important. Other than that, I did not experience/notice other bugs.
As you can see in the image above I was a coward and was just slowly destroying the monster from one side, which took really long time.
With more experience in later runs (I played many runs), I learned to go straight for the head, and using the spikey balls.
I was pleasantly surprised there are different bosses in the game. I really enjoyed figuring out how to defeat them e.g.
I kinda freaked out when I saw the size difference. I thought to myself surely I just dive too early, but I found my way to beat it. Here's a short description how I fought, I am not sure if you intend players to do all that, but that's what worked for me:
I used my superior mobility to outmaneuver the boss, and have him pin me against a rock with one of it's side (his "mouth" was around another rock). I was constantly trying to stay out of its jaws while being pinned, and him locked thanks to aggro. I knew I was not going to win with my 3 spears, and I did not want to use, because that would risk changing our positions. I hit TAB, and edited my moster, making his whole side facing the boss into poison weapon. The boss kept growing weaker, and smaller. When it was too small to have me pinned I switched to frontal poison and I finished the beast!
And that is how I ended up getting to level 6 on that run.
I am not sure if you intend players to edit monsters when they are in combat, but that's what I did, and it was great experience.
As for gaining new parts from slaying bosses, I think it's a good idea. I would like to choose more parts in future.
Great game