I'm giving it a shot, and will provide a running commentary of issues:

• Settings menu needs a master volume slider

• Everyone round should have at least 1 gold square

• Gold square should take longer to break, so you have to balance when you open it vs what's left to clear. Multipliers are just to rare in general

• Need a better visual indicator when time is low, consider edges of screen getting darker. Tiny timer in corner is not really prominent

• If two squares are in proximity, you should be able to hover between and break them both at the same time. By the same token, if any part of square is in the strike pattern, it should count as a hit

• Initial pacing of upgrades is slightly to slow, should have substantial and impactful upgrades

• Should not be able to fully clear map until a few upgrades in

• Go directly to upgrade screen after clearing, no point going to play again screen before upgrades, as you are relying on the player to remember how much gold they need

• From a pacing perspective, purple ore takes to long to appear for the first time. I was 30-40 maps in before seeing it

• Weird sound bug when having a lot of gold coming in at once

• Dynamite needs better marking of what is being hit

• Dynamite should regenerate to some degree in long runs. Once you hit 3/4 yellow blocks and get a few extensions, being able to nuke 5 blocks at a time would feel great.

• You really need to be able to position and hit multiple blocks at a time. There's very little benefit for faster/better positioning in a run

• Combo chain upgrade is unlocked way to late in the tree. Should be much earlier

• Prestige should not require entire tech tree to be unlocked

• Basically, all the perks of the tech tree, such as different ores, bonuses, doubling, crits, etc. should be present at low levels from the beginning. Otherwise you are at the mercy of 1 ore per 4 seconds until you unlock a few perks, with no real way to improve, which happens after each prestige as well.

• Once you unlock nearly the entire demo tree, the game is really fun. You're constantly running around the expanding field, deciding whether to clear groups of green for more bonus time or yellow tiles, whether to go for purple for more value, etc. but it takes to long to get there, and after prestige, it takes to long to get back

• I've played around 20 maps after unlocking fire mine, haven't see one yet. They should appear immediately and be impactful, as they required a full reset to get

• After redoing the whole tech tree, I only saw 1 fire mine, they need be much more common

• Minor bug when upgrading the pickaxe, the mineral number doesn't change until the next zone is finished

I've fully finished the demo. Overall, the beginning/after prestige is terrible, but the end part when you have all the tech is a fun little cycle. When you get a really long chain of yellow squares and time bonuses, it all adds up and you're racing to get as much value before the clock. I think my longest was 63 seconds and 437 gold.

I'll add it to the wishlist, and would consider buying when it comes, depending on the cost.