Well, first of all, I can't say it's not original. While most of participants were fiddling with taking away control over player in their games, you built a damn reactor and put the player inside it. I dig this idea. Is it fun though? I wouldn't say so, sadly. Seems like it got lost somewhere between a clever "8 ball pool-like" take and more serious simulation game, it just doesn't fit and feel right in any category. And the controls doesn't help - especially if you're on a laptop, playing with a touchpad :P Nevertheless, there's a lot of great work put into this, congrats on finishing on time! :)

EDIT: Oh, I forgot to mention - you're hiding the mouse cursor and not showing it in the ingame menu, making it pretty unusable.

very cool and unique game, taking a real world concept and immersing the player in the experience! great job!

Very original take on the theme! I'm surprised I haven't come across more games about nuclear fission. Really cool concept!

This game puts you right into the action, I like it. felt like I was in science class again!  This one of the more unique games I've played, liked everything about it once I got a handle on the controls! 

Going to be controversial here and say I think that the controls are absolutely fine. I think they are just different from the norm, which isn't necessarily bad, just different. After playing for 10 minutes it was pretty natural, the only thing I found difficult sometimes was collecting the coolant as the speed was a little too fast to line up with it correctly.

I mentioned in another comment that the way the coolant works prevented me from completing the game for a while, as I had assumed that any neutron (rather than just my own) passing through the clouds would reduce the temperature. Once I noticed this, I was able to get to the end.

With those two points out of the way; I think this is my favourite game of the jam that I've played so far! I love how it puts you right in the middle of the simulation and allows you to influence it from the inside as well as the outside. I also think it's brilliant how all the particles are simulated and that lowering control rods into the reactor doesn't just adjust some weighting in the background, you can actually see the rods lower into the chamber and see that more particles bash into it. Awesome job!

The controls were a bit difficult to manage, but after a while, I got used to it, and the game was pretty fun. My only nitpick is that starting at a point where you are facing the wall sometimes took me out of the zone a bit.

I really liked this mouse movement, and the theme was really cool! I really liked all of the complexity and moving parts. Good work

I really liked  the unique idea of the game! It took some time to get used to the controls but once I got it I had a blast ;) Well done!

Really cool concept, but I also had some hard time getting used to the controls. Once it's out of the list, it's really good to play. Well done!

Cool game, concept is really unique, at first i thought it's chain reaction from android but glad it's different

I had to get used to the controls first before worrying about anything about what the UI meant and I found that avoiding moving the mouse left to right was the easiest way to move. But after getting the hang of it, it was really fun to move around and that's what kept me playing to figure out the meter management. It was all quite overwhelming at first but really fun!

Really cool concept, great execution of the being out of your control idea. Neat that it was REALLY about changing the environment that all the actors were in and it didn't ultra matter that you were specifically just controlling one of them as it did it's thing.

I found it pretty hard to control but that was ultimately part of the challenge of the game and I love a game with a unique control scheme that's hard to learn. Cool!

The controls seems really unintuitive. I would probably either swap the Yaw and Roll controls or put Pitch on the keyboard. The idea is clever, but the controls let it down for me.

The idea is great, but the game is a little rough around the edges. I exploded twice without entirely understanding why. I liked how the reactor became more and more crowded the more power you generated.

Okay, first of it starts with an overwhelming guide. I think it should really be changed to explaining it in-game one way or another. That way it would be a lot easier to take.

Next up, gameplay: The gameplay has so much potential, but the controls are just bad. I understand it might be meant to feel less in control, but making the Mouse X the roll instead of the yaw is just annoying. Although, the main concept is really good, managing the power to stay in the sweet spot, it really does feel like I'm operating a Nuclear Power Plant, and am trying to be in control, whilst that is impossible.
But then the heat gauge messes me up. It's already hard enough to manage - especially with such strange controls -, but the rising temperature is nearly impossible to deal with. I thought at first that one ice-thingy would cool down the gauge by half, or so; but no, it cools it down by a barely noticeable amount.

Also, when the game over screen shows up, the mouse cursor doesn't, which makes it a huge pain it the butt to restart.

Overall, this game has a lot of potential, and would love to play it after the jam, when these get fixed/changed. However these really make the game not that fun to play.

Original idea, but very hard to play. Even after insisting and getting used (a little bit) to the controls, I still was far from being able to take care of the energy, watching temperature, etc... as I needed to be fully focused on the navigation.

Making the movement a bit slower and more simple (perhaps without the roll, fully controlled with the mouse, less rods in the room, etc...) could help handling the rest.

It looks good but I find the control a bit too difficult.

The controls were a little difficult to use, but everything else was good.

I had some difficulty on the controllers, but I thing that was the idea of the Jam.. Haha

I really like the idea. The controls are a bit too difficult for me to handle while keeping in check everything else. Also had the problems of falling out of the map (through the corners I think) and that the mouse wouldn't work in the menu.