Pretty cool :)

I confirm I had the same bug than @3p0ch - on a computer running Linux, so it wasn't the OS's fault. Could manipulate the rocket properly, but thrust wasn't strong enough to lift rocket. Fortunately, I have another computer and it worked fine on that one.

This looks pretty basic, but quite good for an HTML5 game and the idea has a few good things to keep. Overall looks promising, if you ever intend to work on something like that again :)
+ The game was surprisingly easier than expected - I expected playability to be atrocious with such a control mechanic, but it went pretty well, I managed to get the rocket where I wanted without much trouble (had to try a few times over, but that was expected). Also, the passages are (often) large enough so it's possible to get the hand of it and not constantly hit the ceiling or the walls. So, good thing there :)
- The health system does feel a bit random. Losing health isn't always proportional to the impact that feels when the rocket hits an obstacle. It wasn't too much of an issue to me because I'm used to the kind of game that would straightforward crash the rocket the moment it merely touches the corner of an obstacle. But I'd understand
+ Short levels, and not too many levels. Prevents boredom as well as some risk of rage :) (Not all risk, but some of the risk)
+ There's only one song throughout the whole game, but it felt quite in-context and not too repetitive.
- Graphics. They look pretty cool but they feel a bit... unrealistic? I'm not expecting the whole thing to be photorealistic - it's an HTML5 game after all - but it really felt like models placed in Unity. I'd recommend 3 things : adding small visual effects to make it look more natural, make the movements of the blocks more natural (it's a basic ease method - I'd expect rock-against-rock friction to be more linear and irregular) and make the textures more rough (add dirt, sand, cuts in the stone) and the models' corners smoother (if it's an old temple, erosion rounds the corners of stone). Also make sure blocks don't pass through each other and that they are always linked to a static object (in opposition to floating in the air).
+ Graphics (again, but a plus this time). Despite what I said above, I have to admit the amount of models is just right, not too many, not too few. I can see where I'm going pretty easily. Even the bright lights weren't a distraction :) What I mentioned in the precedent point are only minor changes, just to make the whole thing look less like it has been edited in Unity.
+ The hitboxes of the coins are super large, making them easier to collect. THANK YOU! Also, you can't crash on the landing pad at the end of a level, avoiding common deaths at the very end of the level. THANK YOU again!

Overall looks promising, I don't know if you intend to go back on this game and improve it (or make a sequel?) but it would definetly be worth it. If you want me to explain better anything I just said, feel free to send me a message :)

Keep up the good work! ^^

When I play it, even if I hold down space constantly on the first level, the rocket doesn't generate enough thrust to get off the ground. Does that in either Chrome or Firefox on Windows FWIW, but I get the feeling that's probably unrelated to the underlying issue. Assuming the game was working fine for you when you were developing it, the only think I can think of is if it's an issue of different framerates when you're in Unity vs in the WebGL build that're screwing up the physics if it's not scaling by Time.deltaTime (or if the scaling math didn't end up behaving like you would want it to). I hope you get it working 'cuz it looks like it might be an allright game if I could actually play it.

Interesting.
It feels like the environment and art was done by a different person than the mechanics and the VFX.
The concept is promising but the feedback needs to improved a lot.

- Health mechanic doesnt make sense as one mistake leads to destruction anyway even when the health bar is incremental. Consider adding countable lives, or "invulnerability" frames after receiving damage, otherwise it feels like a flappybird where one mistakes is Game Over
- Feedback - Rocket particles are Dude, this is super important, you need to reward you players visually.
- Be nicer? Why not throw in a few more pickups into the game? Its a challenging game, so dont be so scarce with the rewards :)

That's it, hope you have some time to improve the feedback of the core gameplay, then I think it will be pretty cool.

On another note, A rocket in a temple? Even it's a small game, these choices of theme and setting matter and should fit together to form a coherent experience.

Good Luck!

Turn down the volume in the options, still plays volume in full when the game starts. Tap A or D and fall over. Press SPACE and explode. Lots of fun.

physics are bad, but good concept