Hi, thank you so much for your feedback!
1) About the enemy - in general, it was conceived that it would be a surprise that he can move
2) Portals remain purple - I thought it doesn't need to be explained, the player will just understand that you can't go into the purple portal, but can go into the green one when he kills all the enemies
3) There is no music and sounds in the game - I agree this is a minus, the fact is that when I created the game I did not know how to add sounds to it
4) The ability to become big was conceived to be one-use, and I wanted to add an inscription to the interface that it is one-use, but I forgot:)