In order to fullfill the kickstarter project all pledges have to be done via the kickstarter site. I'm not allowed to pledge myself. This means if I would allow an alternative ordering method that I would have to pledge via a friend or so and do an advance payment on myself, which is a huge risk and not fitting the Kickstarter policy.
If people would pay in advance it would mean I would have to return all payments if the project doesn't succeed. That's why I decided not to do this.
There is a good alternative to paying with a creditcard, which are prepaid creditcards. For example this one: https://www.neteller.com/en/features/cards/virtual
This is without costs and you can put an amount on it and the pledge in a proper way.
I really hope this barrier will not be too big for you if you don't have a creditcard. Please don't hesitate to contact me to find proper alternatives if this doesn't work.