1.) How long did you play for?
About 20 minutes.
2.) How long do you think you could spend playing this game before you got tired of it?
Same as above: I ended up quitting because it was too challenging.
3.) Would you change anything about this game? If yes then what?
The tutorial was confusing. To be precise: it was really good, but it didn't prepare me for the procedural concept that the game actually was. From the tutorial, I thought the whole game would consist of premade levels, which was exciting. To eliminate the confusion, the tutorial probably shouldn't be premade, and function similar to endless mode. I guess you could make the tutorial scripted though so it drops the same blocks the same way each time, so you can tutorialize it more easily.
The font definitely needs to be improved. It is hard to read: it seems too pixelated. It is especially evident when you use it for small-sized instructions, but it applies to the bigger usages too. It really brings down the level of polish of the game, even though everything else is very good.
4.) Did you encounter any bugs?
Nope.
5.) Was anything confusing or difficult?
The dash cape seems to be really difficult to control. It seems like it was too responsive: my first arrow key tap would initiate the dash instead of the second, perhaps because I was holding it before.
The endless mode due to the tutorial issue I mentioned earlier. I had no idea lava would start rising, or that blocks would fall.
Also, it's kind of weird that you call it "Endless Mode", even though it's the only mode available. Unless you plan to make other modes, which would be great.
Getting new power-ups is a bit chaotic, since you're being pressured by lava, and most likely have no idea how it works/controls. Maybe make a more detailed pop-up or practice mode where you can test out power-up controls or something?
6.) Do you think $7.99 is a fair price for this game? If not, what would it take to make it worth that price?
I don't know... it's only at version 0.11 isn't it?
The procedural generation mode is fun, but having pre-made levels seem to have huge untapped potential that you should look into. Maybe even some sort of adventure/story mode. When I was playing the tutorial, just being able to test around the physics at my own pace, rather than being pressured by lava, was really fun. You've already got the physics and most of the structure. If it had that, I would think that it would be a great price for the game.
7.) Any additional thoughts or comments?
It is too difficult in the beginning! You should really to try make it as easy as possible in the beginning, to get the player hooked for a few minutes. Slow down the lava and slowly increase its speed, add more obstacles/possibility for challenges in increments, like 100 ft or 250 ft. The longer you make it easy, the longer you can get them to play! Of course, if it is too easy, then they may quit, so you have to strike a balance. Personally I stopped playing because I kept dying too easily.
Another suggestion is to add more practical bonuses to start with that the player can buy with coins. Make it possible to pay for power-ups either permanently or per-game. So the more the player plays the game, the more they feel they can progress higher despite failing, because they may have obtained coins to help them reach higher.
Have a look at other proven, popular procedural games like Temple Run or Tiny Wings and see how they do things.
Oh, and what is with the logo? It's looks like too much like a graphical bug, even though on closer inspection it's not. Similar to the font issue, you should try to make it more clear/readable!
Overall, it is really great. Great music, animation, graphic and aesthetics. The trailer seems to show many more awesome obstacles and gameplay, though I wish I could reach it
. I'll definitely give it another go.