Endless runners can be kinda fun, and this odd little example I found on Steam for less than a buck is no exception. Literally all you're trying to do is guide a pug (a popular breed of frumpy dog) as it runs through an obstacle filled landscape. The farther you get, the higher your score.
The artwork is simple, but still colorful and friendly. The music is also fittingly friendly and lively. In fact, it's likely to be stuck in your head for hours. All in all, it's worth trying it out for a few minutes, and there's enough of a challenge to encourage you to try again later. An easy way to get it for "free" would be to sell a few unwanted Steam trading cards
in the community market, and buy it with the proceeds.
Simple, enjoyable endless runner
This genre is much more common on mobile devices like iPads or tablets, so it's nice to see one make a little splash on the desktop. There is very little to it beyond timing your jumps over obstacles, making it a pretty bare bones example of the genre, but if you've never played an endless runner before, I'd say this would be a good introduction.
Good for the price
It's barely a dollar at full price, and I've noticed that it goes on sale for a large discount fairly often. You'll be able to buy it with the spare change you found in the couch earlier.
Multiple playable characters
There are twelve characters for you to play with. Most are some variant of a pug, such as super pug (a pug wearing a red cape), a pug wearing a jack o lantern on its head or the pug with a rainbow trailing behind it. There's also a cat (including a variant wearing the Cone of Shame) and a penguin. The latter is almost impossible to use in actual play however.
Timing needs to be very precise
Some of the obstacles you'll need to dodge are only slightly lower than your pug's jump height, making it mandatory to jump at the correct time to avoid hitting them. There isn't much of a window to do this, making it very difficult to navigate new areas.
Night time scenes are extra difficult
Every so often, night will fall and the level will become shadowy and dark. During this time, the more hazardous obstacles become almost invisible. This can be frustratingly hard, so be prepared for a challenge when the sun goes down.
Many obstacles are bloody
Your average obstacle is going to be a change in elevation -- or in other words, a crate or hill that you need to jump on. However, the next most common obstacles are sharp metal of some type, such as buzzsaws or giant spikes sticking out of the ground. These are often depicted with what appear to be blood stains on them.
Getting hit means exploding into fireworks
Despite the above warning, actually losing just means that your character bursts into a shower of sparkly pixels; a firework display in miniature. There's no gore or even indication that anybody actually got hurt.