It's a nice concept, but for a simple geometric game it seems to have pretty high CPU/GPU requirements. I found that the chain links in particular didn't seem to be rendered every frame.
It's an interesting concept but would benefit from a progress indicator (I know I've done 65 levels, but how many more are there? Or do they go on forever) and a consistent difficulty ramp (level 63 felt like a repeat of level 20-something).
I'm impressed by the way the music doesn't miss a beat even while the main game thread is so completely tied up that it hasn't redrawn in more than a minute. But this is one of the worst choices for badge of the day in a long time. Is it really to hard to pick games that actually work?
The UI is hideous. The only way I can see of telling whether you've currently got one element selected is to click another and see whether it tries to combine them.
My understanding of an idle game is that it's one where you can, if you wish, step away from the game and it will continue to make progress. However, this turns that on its head: at present, I cannot do anything useful until I've waited about 90 minutes to get the next upgrade of Mutation Chance, so rather than having the option to step away I'm forced to step away.
If you try for the legendary route, be careful not to pick up the sponge before it changes colour. There's no way to reset if you make that mistake, so you have to reload the page and start right back at the beginning. For that frustration alone, 1/5.
Why is this tagged idle? I just came back to it about 12 hours since I last played, and I had made no progress in that time. It's not an idle game if you have to leave the game running and your computer on.
A bit more imagination on the "You're doing it wrong" texts would be good. I tried giving the teabag to the mouse, and was told it was too big to fit into the mousehole. In that case, so is the mouse.
What I don't understand is why it sometimes says "Failed" and resets the level even though there's only one colour left. Bug, or something in the rules which isn't properly explained?
The tutorial mode is allegedly on, but after the cut-scene ends I'm left looking at a screen with no hints, and although I think I've tried clicking everything the only things I can do are bring up menus. What are my goals? Where are my characters? What actions are available?
Simple and fun.
A couple of things could be improved though, and are worth taking into account for your next game. Controls: when the game is played solely with the keyboard, it's frustrating to have to switch to the mouse to restart. Instructions: I'm still not sure what difference blue dot frenzy makes (I'm guessing that it affects the score) or what "Gold Mode" is. Feedback: I don't think I get any feedback on how close I'm getting to eating 20 dots and activating "Gold Mode". But the feedback when unlocking a character or collecting a key is so intrusive (and slows the game down so much) that it has killed me more than once.
On the fourth level it's refusing to advance to the second wave, even though I haven't seen a live enemy for a couple of minutes. Hitting a bug which forces me to restart before the game has really got anyway => 1/5.
Most games of this genre have a final level which is a few orders of magnitude harder than everything which went before. This one curved much more smoothly: there were some levels where I had to think, but none which felt unfair, and the final level had a bit of complexity but didn't require pinpoint precision. Thumbs up.