Its a good song, but i don't understand the high value for the tempo. The space between notes are high, so, there's no reason to use a tempo of 200/3. Also, the first 2 square channels are doing the same almost all the time, i mean, if you optimize your song you can put all sounds in a NSF without expansion chips.
High Tempo = No Volume Sequences, they are done straight in the vol. Column. And yes, It is meant to be like you can optimize it and output it via no expansion chip