Oddly enough, this is the first mining game I've seen so far, which is weird since it's perfect for the theme.
Visually the game is great, and it has really nice sound design to go with it. The only thing I would change is making the shop text less blurry (I get the effect you were going for, but it's a bit too much form over function) and maybe relocating the low battery warning to the top of the screen so it's less intrusive.
Overall, this is an incredibly unique concept and a very fun game!
I should also mention I encountered some bugs, the first was relatively minor, the jetpack essentially disconnected itself from the fuel gauge. The second, however was a complete crash of the game after completing a run and trying to exit the shop.
Here's the error message I got, hopefully it's helpful:
An error occurred running the Unity content on this page. See your browser JavaScript console for more info. The error was:
RuntimeError: index out of bounds
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[63731]:0x113f2df
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83490]:0x1acb0d9
invoke_iiii@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:384296
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[63733]:0x113f754
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83492]:0x1acb0ef
invoke_vi@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:384157
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[1188]:0xdd071
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[1201]:0xddfb6
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[1102]:0xd0c42
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[1065]:0xcf863
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[3978]:0x22b9c1
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[43883]:0xcf6586
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[43885]:0xcf65d9
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[39120]:0xb70a6d
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[63104]:0x1130b59
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[63731]:0x113f2df
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83490]:0x1acb0d9
invoke_iiii@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:384296
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[63715]:0x113e277
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[1089]:0xcfd35
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[82674]:0x1a6ff3c
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83346]:0x1a9f049
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83408]:0x1aa5a2b
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83413]:0x1aa5b8b
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[74740]:0x179158d
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[82742]:0x1a73090
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[74680]:0x178bac4
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[74645]:0x17863f3
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[79174]:0x19c44a2
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[79124]:0x19bb855
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[79124]:0x19bb8c8
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83466]:0x1aad1c2
@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254 line 10 > WebAssembly.instantiate:wasm-function[83495]:0x1acb115
browserIterationFunc@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:209157
callUserCallback@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:162726
runIter@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:163982
Browser_mainLoop_runner@blob:https://v6p9d9t4.ssl.hwcdn.net/1a515269-c270-466f-a645-29d7d3911254:10:162262
I used Firefox to play the game, in case it's a browser specific issue.