I liked the Tutorial with R.O.B.; this makes a tutorial more interesting and less boring. What bothers me was that when more text displayed, the align changed (probably the text box is too small). So it was hard for me to read the text. For polish, add talk sound effects (good for immersion 
).
The speed of the blue cube is too high, I sometimes clipped through the wall. Because of the high speed, it was for me hard to control the player. After the tutorial, level 1 didn't load at all and I had no idea what was happening. It was also hard for me to see the level, because of the red lines.
For the fire trap, think about an indicator to recognize that there is a trap, but keep it small so the player can miss it.