I played some games, have done 60 points on Wave 7 in the first level and 46 points on Wave 6 in the second one the best so far.
I agree with the person below that sometimes I'm not sure why I can't reload even when I'm not touching any other command but that's my only caveat and otherwise the game is super addictive. The speed of the cursor is perfect, the speeds and different hps of the different enemies feel right and I think their hitbox is big which is good, when I think I'm hitting an enemy I indeed always do. The different upgrades are cool and the difficulty ramps up fast enough which makes retrying much more engaging, there's basically no dead time. The music is super cool and it does feel like a NES game.