People don't trust Kickstarters anymore sadly. If this was 2012 you would have nearly $300k by the end.
Too many games have made more promises than they can fulfill and released unfinished, now gamers are very cautious about backing. Journalists don't like Kickstarters too much now either because it floods their inboxes, in general they tend to shy away from indie titles unless they look solid and provide a playable build with the email.
Kickstarter is being phased out by the gaming community, it sucks because you guys definitely deserve it and I hated to see that burst start to slow down. Another slight mistake may have been launching the Kickstarter so close to the holidays and after like 4-6 AAA titles have been released. Potential backers may have just spent $120 on FC4 and GTA5, so they may not have money to back. Others might be saving the money for black friday or christmas. The best time of year to do Kickstarters is April.
That graph you're seeing is normal, that's the end of your pre-launch fan base backing the project. Now it depends on exposing the game by landing articles/lets plays.
We need to get agreement from top youtube gamer channels to help promote, otherwise its going to be hard.
I have a campaign up now myself, the Yogscast and a few other big youtubers played and it only spiked our backers by 8. We also press-released to over 60 sites, only to get an article from 20, including two by RockPaperShotgun. We haven't been able to get a second Kotaku article since march, but Kotaku can deliver a big spike if you manage to get one.
This was much harder than me and my partner imagined, and I'm sure you guys see that as well. We wish you the best of luck!
what happen if we don't reach 130k in 4 weeks? project just end?
No way, they can't give up! There are many successful titles out now that had failed Kickstarters, including Insurgency.
