Different speeds

Hi! I developed a simple game, it's just like the helicopter game, but in this case it's a little bird that has to fly and avoiding getting hit by some random generated rocks.

I thought i was doing great, but then i noticed it works painfully slow in some computers (i've seen this happen in two laptops) and super fast in others (i've seen this in one Mac laptop).

The key of the game is the speed, because it demands the user to have a good reaction time so when the game goes slowly, it's very easy to play and get points.

Is there a workaround for this?

Thanks guys

does it use physics?

You can set the sampling to framerate independent.

It does use physics to simulate the fall and the ascension.

How can change that sampling?

PS: i just discovered, in the same computer it also changes dramatically depending on the web browser.

PS2: ok i'll try this scirra.com/tutorials/67/delta-time-and-framerate-independence/page-1

Make sure the graphics card driver is updated and you are using a good browser (Firefox/chrome) so that the game is running in webgl.

S2: ok i'll try this scirra.com/tutorials/67/delta-time-and-framerate-independence/page-1

thats good

If its still slow you are probably using too many sprites or something