Cool concept!
Moving multiple characters was also of one the ideas that came to mind with the theme. Cool to see the idea implemented.
As feedback there was a bug I noticed, which happened for me a lot during level2.
When you enter the red square box. The menu UI for the next level shows up on the screen (Next-level-text).
When a character dies, the character XXX died comes on screen. This red text (died-text) dissapear after a bit.
So, whenever a character just dies before you enter the red-square box.
Both widgets are on screen (next-level-text & died-text). But, when the red died-text disappear also the next-level-text dissapears.
So, at that moment I could not proceed to the next level - since the text was gone.
So, whenever you remove text from the screen, make sure you don't remove too much.
Was fun to play for a bit!
Great job on creating and finishing a game!