Yes ofcourse! Starting chronologically:
When starting level 1, I didn't understand the mechanic of placing the first color, this can be because I played the WebGL build which cuts a portion of the game's screen height. Now I understand that the robot has a slight bouncing animation to indicate that you can click it, but it was not clear enough for me to intuitively understand this the first time.
After placing the first colour, I was clicking on all the beakers that contain colour, but nothing was happening. Shortly after I noticed that there were empty beakers that you can use as auxiliary to temporarily store colours, which then made a lot of sense. After that the game played smoothly.
Conclusion:
First time starting a level, maybe add a helper text to explain the mechanic to change one of the colours by clicking on the robot. 'change an upper color by clicking on the robot, it can't be the same colour as the robot', something along the lines of this.
The empty beakers blend a little too much with the background, maybe add a white background to the beaker sprite so that it is in front of the background texture.
Hope this helps, I find it a very relaxing, enjoyable puzzle game!