Most free games try to milk you behind paywalls rather shamelessly, but this feels like a neat little arcade that's not so pressured.I'm enjoying myself; the controls are simple and NOT joystick based, but rather Swipe based, as a touchscreen app should be.The imagery is cute and easy to understand, it's got some puzzle elements to it but with a quick response needed at times, and the upgrades typically last through a life.You swipe in a direction to move/attack in that direction.If you swipe at a dirt block, you break it.There is no jumping so be careful how you descend.Enemies each have their own personalities and speed, some of them are best observed before approached. You can kill them with a well timed swipe or a drop on their head Mario style.Collect fireflies for your currency in your current life, they're your score as well, but at the end of each level you get the chance to buy upgrades.I've only gotten to level 3 thus far, but I plan to make it further.Have fun downloading!