there is a free version in the homepage www.clickteam.com I think that is the homepage and also every version you download has some tutorials that help you on understanding the engine, also has a quick physics tutorial if you wanna try to make a physics game, is a visual scripting engine really, it is not a code writing one so I hope you're good with visual scripting, and... well I think that's the only thing I have to say about it. Oh! And the guys in Clickteam know about what we are passing with the you-know virus, so (idk if they still have it) they have a event in where I think, you can download free version then they give you a code and you have to enter it (I don't freaking know where) into the engine and then you have (I said idk I think) that the code gives you the full version for free! But well, you download it, you judge it and you say to me if you like it. But hey, there are some limitations in free version: you can only use up to 3 frames (you see, everyone of the screens of the game is a frame, even the menu), and some other things I didn't wanted to read (lol). You can go and use it, and tell me if you liked it and I see you later with the answer.