this is a really fun and interesting game! i had a great time playing it.

here're a few notes from my time with it

TUTORIAL
- a popup window with the tutorial and a "skip" button upon game start would be appreciated it. i didn't spot it until fumbling around a bit.
- you can get rid of the "okay got it" button. it's the same as the "x" button except for i kept thinking it was okay/proceed and closing the tutorial by accident haha
- the instructions themselves were clear and had a good amount of detail. the gifs were very helpful.

BUILDING
- all the shortcuts and controls are great!
- i ran into a bug where the camera become uncentered after a test -- is there a way to pan left/right as well as zoom?
- it would be helpful if your money increased/decreased as you removed/added components to your creation.
- it would be great if the fact you can click on the pieces you can buy to get a description of them was in the tutorial. 

BATTLING 
- ran into a bug where the camera remained zoomed in after a match and i couldn't see my opponent when betting. the camera remained zoomed in during the next battle and also up too high (couldn't see the floor). i think maybe i didn't have an opponent? i lost from going over the far edge.
- the betting system is a lot of fun, and it's really cool to see other player's creations!

POTENTIALLY INTERESTING ASPECTS
i think more options for things to add to my creation & different kinds of matches (with different goals) would both be fun additions if you're looking to add more stuff :)

I tried several times on a PC and a smartphone, and I couldn’t play due to severe freezes and low fps of the game. an ordinary user with a budget device will not be able to play, perhaps optimization is needed, measuring FPS and disabling unnecessary things. Only half of the screen is visible on a smartphone.

But the idea has powerful potential for further development, people even love to just watch the show, if it’s fun, then one wins, then the other

I love the mechanic where the time it takes energy to reach your mechanism depends on their distance from the engine! Also I may be biased, but I don't think your game is as confusing as some other comments might make it out to be. 

One confusing part though is that it seemed like I was able to spend infinite money despite only having $1000 at the beginning? Regarding visuals, all the sprites have pixels of different sizes, which makes the art seem very disorganized/inconsistent. There were also tons of default vehicles that kept popping up in the matchmaking, which made for some repetitive fights.

Regardless, I think this is a very solid concept and I can see myself playing for a long time!

I didn't understand the game at all. There is a tutorial but it doesn't explain much. It explains how to make joints or something which doesn't mean anything if I don't know what a joint is at all. I think an interactive tutorial where it guides you through the process of making a machine and then have it fight against a small AI opponent would explain a lot. 

I really like the concept, I think the largest problem you will face is just how confusing and daunting the game is. I came VERY close to quiting after trying to grapple with the basics for the first 5-10 min. Once I understood the basics it became interesting, but there are a few major flaws I noticed:

• Matchmaking seems to be entirely random, so I am either paired against something I have 0 chance of winning against, or a contraption that automatically falls of the map and I win. This makes it really easy to cheese the betting system.
• The gun seems pretty useless, especially for how expensive it is.
• I would like to see more depth into the physics, stuff like suspension, dampers, springs, motors, etc. You could make some crazy contraptions! I know you can edit the joints, but its way too confusing so I didnt touch that.
• Test mode is quite buggy, it seems to freeze a lot and pressing T doesnt always work.
• I didnt even see the tutorial, or most of the UI buttons until very late in the playthrough. The UI needs a lot of work.