Private Mining Company

I just Install the demo from steam , for some reason the menu has a huge delay, Just wanted to leave it here just in case something common with steam demo or maybe just me (Here the game run just fine)

Was about to upload some gameplay, good thing i decided to search the game here xD 

TL;DR you've put a great twist on a saturated genre, has the potential to be popular but the level of polish, fidelity and QoL will be compared with other games in the genre as a bar to entry.

Positives

• I like the twist of persistent units, a sort of blend of XCOM meets TowerDefence
• I like the idea of mercenaries being weaker but somewhat expendable
• I liked being able to pull in waves early

Negatives

• The health bars underlapped the units, making it hard to keep track sometimes
• I couldn't figure out how to cancel placing a mercenary

Opportunities for improvement

• Indicator of number of waves left (Unless you're going for a more gritty/helldivers feel)
• Splats or impact effects for creatures taking damage or dying
• Range indicator circles when placing or hovering over units
• Unit Distinction
  • Summary of who died/survived - maybe even give them names or badges for duration of service
  • Different coloured hats for in-level identification
• Menus and UIs felt a little bland, you could consider leveraging a UI asset pack such as this
• Consider adding in a incoming wave indicator as seen in games like BubbleTanksTowerDefence, which would work nicely with your speed up feature 
• While a lot of the features are staples of the genre, I didn't know there was a mining drill - perhaps something to highlight