Did Kenneth indeed time-travel?

Question

In the movie Safety Not Guaranteed, Kenneth's ad was (emphasis mine):

"Wanted: Somebody to go back in time with me. This is not a joke. You'll get paid after we get back. Must bring your own weapons. I have only done this once before. Safety not guaranteed."

Was there any indication or hint in the movie that Kenneth was able to time-travel (before he meets Darius and her colleagues)?

Is there any indication or hint in the movie that it was indeed a time-traveling Kenneth who crashed his car into Belinda's then-boyfriend's house (proving Kenneth's claim that if Belinda is alive, then his time traveling worked)?

What about any other hint that Kenneth was able to time-travel (in his attempt with Darius)?

Answer 1

Of course he time traveled. He went back once before, saved his ex girlfriend by crashing his car into her house. He must've run the original deadly car off the road before crashing into her house. He wanted to return again so he could prevent himself from crashing into her house in the hopes of getting her back but then he met Darius and he changed his mission to save her mother. Which is where they went in the end. Great movie!

Answer 2

I think that its supposed to be open ended, but I believe he probably did time travel in one scenario. My other thoughts are that he never time traveled but wanted to because he was in love with the only girl that didt make fun of him and was going to fix his mistakes. Though by Darius falling in love with him he didnt need to fix his past. My last thought is he was totally crazy and built a suicide machine and this was a very dark ending of two lost souls. In any case I was left wanting more and was left wanting the magazine story or some answers