well, let's say its really different & refreshing, your didnt get the feeling to already have seen/played something similar
nice theme, superb artwork, sound/efx matching
design has some flow, will say its average, not to brutal, not too much "stop & go"; with some shoots too easy (right lane) and just next some shoot to hard (the right ramp)
and than the gameplay, which must be linked logically to the code : its quite good already (and not poor as some others titles were at the begining), but for sure it needs more than few updates
i still want to believe these will come, and than may be yes, this pin could be a killer