Hi Tinystuffz,
Looks like you've done a great job so far! Congrats! Is there any reason why you've set a goal of €20k? I think it would have been better to set the goal of €10k. By now you'd have 100% funded, which would attract those backers who still doubt about it. I always encourage setting a lower goal than you really need, unless you are 100% sure you won't do this project if you don't reach your goal.
Getting back to your original question, have you tried contacting influencers in your area? If Forbes, PC Gamer and The Escapist have written about you, it will be much easier to outreach influencers. You can offer them a % from the orders they generate. You can track that by creating unique Kickstarter URLs for each influencer.
You can also message your current backers and offer them a pledge upgrade or (if they are happy with the current level) you may ask for recommendation. There's a great way to encourage recommendations and get new leads by using a Referral Marketing Software (e.g.
https://referralhero.com/). You could send an email for your mailing list and those, who recommend the most will get certain prizes from you. Referral marketing software will help you manage this. I know a guy who used this strategy for his book launched and it worked very well.
Finally, have you considered running Facebook ads? Not sure if that would work in your case, but if you have a limited time and need fast result, you could try running ads with a small budget (e.g. 100 EUR).
Vilius
https://www.kickstarterbook.com/
