Ouch... That's really harsh, man. Still, I appreciate your feedback and will keep it in mind while trying to improve the gameplay for the full version. Personally, I never had any difficulty with the speed and/or rate of the projectiles and was even afraid it would be too slow for potential players - but then again, I designed the system, so it's no wonder I had a much less hard time with it.
Anyway, thanks for the review, and I hope you'll find the new version much less frustrating once the "reworking and fine-tuning" has been done.