The music is nice! The controls are simple but I wish the robot would slide along the diagonal walls, altough maybe a Roomba in real life wouldn't do that if it hit a wall diagonally :-J
The mechanics are intuitive and I was able to clear the game quickly.
Maybe tell the players that [R] Restarts the level. That's a useful key that I found by chance.
And congratulations for developing your first game! I hope you had fun learning the ropes of Construct 3 and I'd suggest trying polish the game a bit more and play with some features, idk, maybe add some particles and effects, try doing some animations and explore what your engine is capable of!