What a nice game! I really had fun playing it. I had to restart from scratch once because I lost the people when I fell into the map (where you have barrier of trees), but besides that it was fun. I think the game design (with loops getting bigger as you get more and more tools) is really clever.
I got a little confused that my people did not get to respawn in the truck when pressing P but I eventually got used to it. If you add the different controls (for the new tools you get) to the interface, an indicator of how much "power" you have before having to be rewound and an indicator to show how many people are sitting in your truck that would this game perfect!
Keep up the good work!