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Gray - Physics Engine

rated 3.14 / 5 stars
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Action - Platformer - Puzzle

Credits & Info

Nov 21, 2010 | 12:31 AM EST

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Author Comments

So the physics for my upcoming game are finally done! I've done a lot of updates on the animations; added some, removed some.

The engine is made so that you can tweak the physics in whatever way you want, and if you'd like, tell me what settings you find most fitting for the game. (Oh, and make sure to press the "Apply settings"-button every time you want to make a change)

Move with arrow keys [Left and Right]
Jump with [Space]

I feed on your feedback, and will appreciate every single comment! (=



Rated 4.5 / 5 stars

Good game

Great game, I wish you made this into a tutorial, I really need help on building physics games, there's a glitch though, I mistakenly removed the decimal place on jump making it 155 instead of 15.5, I jumped too high and went into the title, then I ended up jumping off the screen... Anyway, settings. I changed Friction to 1.5, kept falling off platforms without it, also changed left&right to -5/5, felt the char ran too fast without it.

TBearify responds:

Thanks, I'll make sure that bug doesn't appear in the final release! Also, if I have the time, I might be cooking up a tutorial :] If not, there are lots of good tutorials on the web allready ^^


Rated 5 / 5 stars

I only changed one parameter

I changed the friction from .5 to .75
Kept max left/right at -8/8 respectively
Gravity at .9
Max fall 18
Jump start -10.5
Those settings felt very comfortable and typical of platformer games with the apparent graphics and proportions.
Can't wait to play the game :)

TBearify responds:

I'll make sure to turn the friction up a bit before publishing ^^ Thanks mate


Rated 2.5 / 5 stars

My preferneces:

Friction: between 1 and 1.2
Max Right/Left: between 6 and 7
Gravity: between .6 and .9
Max Fall: between 12 and 15 depending on gravity

And the jump height is totally up to your level design. Good luck, you have a nice engine starting here, I'll be waiting for the finished product. Also, this current engine has terrible bugs. My character moon-walks whenever I run to the edge and stop and he can also jump from the sides of things as though there was a ledge in mid-air. Sometimes he gets stuck moving too and I have to press the same direction again to fix it. Finally, there is intermittent delay in the controls; especially the jumping.

Make sure to fix those things before the final release.

TBearify responds:

Thankies [: I'll try out your preferences at once. Yeah, those bugs are caused as soon as the numbers are changed to a value that doesn't work with the formulas of the game. I'll make sure to fix it before I publish the game C=


Rated 4.5 / 5 stars

Great Engine!

Friction: 1.5 - 2. I thought anything less than 1 made the game too "icey".

Max left/right: -4/4. This allowed the character to barely make some jumps, but have some extra room for error on others.

Gravity: .8. The default .9 was alright, but it could use a little more floaty-ness to it. Letting the player move the character mid-air while they still had time.

Jump Start: -10. The default was great, but a little less wouldn't hurt.

Max fall: Default. It's fine as it is.

Just as a side-note: This is a great idea, allowing users to look at the physics of a game before you publish it. Good luck with the final product!

People find this review helpful!
TBearify responds:

Thanks, I'll see what I can do d= Can't decide whether I want a bit of ice-effect, or none at all xD

Hehhe, yup it makes it easier for me to see what you people want! :D


Rated 3.5 / 5 stars

I quite liked the game

But it would have been nicer to give instructions on moving the character. Sure I get not explaining the settings cause we're supposed to go experimenting it out, but I had to click wasd before the arrow buttons, and the up arrow before the space button in order to find out how to control the figure.

But nevertheless, I liked the simulation.

People find this review helpful!
TBearify responds:

Ah of course, how could I forget xD I'll make sure to put the keys in the description at least, hehhe. Thankies [: