Excellent game and challenging!
Here is my feedback:
What do I like?
- I enjoyed the mechanics and the gameplay of the game
- Nice usage of the theme and restrictions (You messed up the colours limitation with the effect you are using, at least you were when I played the game!)
- Excellent level design
- Excellent player feedback
- Nice music and SFX
To Fix:
- The shape/light that is flashing, I think it should be as same size as one cell
- The letter "U" seemed a bit like a "V" in the hud
Suggestions:
- Maybe, display the number of the current level and total levels (Ex, Level: 3/15)
- Maybe, add the ability to use the Numpad
- Possibly, show how long did I spend to finish the stage (this would make the game more fun)
- Maybe, if the player is trying to move to a place where isn't able to move to it, the shape/light that is flashing change it's colour to something else, for example, red
- Maybe, if the player collided with the enemy from the sides or the back, destroy the enemy
- Maybe, make the start button on the main menu like a real button, i.e. the game starts like any button, and when I press it, the start button goes down