the robot is very cute and the attack mechanic is fun, i had a good time trying the different combinations. the sound effects and music worked really well with the game too, although the music did cut out for me at a certain point so it might be nice to see if you can loop it in a next version.
unfortunately killing every enemy in level 2 didn't trigger any kind of ending or next phase for me so i didn't get to test the levels after that, but the early levels show a promising concept :)