I wasn't even around during the 1.9 days, and I can very much agree with the fact that this level is definitely one of the better aged 1.9 levels. Solid core designs that honestly is seemingly difficult to replicate, very fun gameplay parts with a smear bit of inconsistencies (I still hate that 43 ship part), and quite a fair and difficult challenge. I'd recommend going for this if you wanna get better at the wave (most especially).