Also, for your review, please know that the game can be very fun once you get good at it but can be a bit brutal at the beginning (I tried to fix it but it is kind of inherent with the gameplay).
Also, know that there are 3 other ennemies that are unlocked once you reach 10k, 20k and 30k points.
And for the anecdote, the game is available at an arcade machine in my school and is performing like really really well (basically people play it every day and the record is at something like 400k points which I totally did not anticipate to be possible haha).