The release date is approaching, so you don't have much left to wait, and so your wait is not as painful. I shall give you a brand new update of the Qubicks Demo. This one features not only bug fixes (which are still really important) but new content as well that you can explore.
New Content
Portal animation and particles on enemy spawn, so now they're not just appearing from thin air.
Massively updated tutorial.
Added tutorial to the Main Menu and Level Selection screens as well.
If you accidentally hide the "Shop" panel for the first time, it will tell you now what happened.
Added a tooltip when hovering over the "XP" counter in the Evolutions screen, telling how to earn XP.
Added bounce animation when hovering over placed towers.
Added a new tower called "AC" and it works exactly as an Air Conditioner - it makes the temperature optimal for towers in a certain range.
Added a new tower called "Barracks" with 2 new mechanics - it summons other towers, more specifically "Fighters", and it can be placed only on blocks near the path.
Added tooltips to the Laboratory panel, when hovering over environmental indicators, it tells what each of them means.
Bunkers are now protected from radiation.
The higher the pollution is, the stronger the "Cataclysm Collector" tower is now.
Added animation of floating for the submarine.
Updated the Point & Click system to look for the nearest possible place position in a small range around the original click, making it much easier to hit the available spot for the tower without frustration.
Updated the Drag & Drop system to drag the tower above the unavailable territories as well - when the tower is above one of them, it becomes red.
Blockades and Fighters can now be placed anywhere on the road, even if there is a red zone from a nearby tower.
Balance Updates
Nanobots now gain XP faster.
Intensive Smoke now returns enemies on 8 blocks behind instead of the whole way.
Changed way of earning XP for fighters and blockades - they earn XP now for taking damage.
Increased cost of all submarines and increased red zone around them.
Added more health and damage to blockades and fighters.
The game is saved now only after beating each wave to prevent abuse with currency.
Fixes
Bug when smoke towers didn't actually slow down enemies.
Bug when towers could sometimes be placed on the path and in the air.
Bug when you could place towers on enemies.
Bug when left list of articles in Guidebook could be moved horizontally.
DMG numbers on towers dealing continuous damage now show DPS instead of actual damage dealt every frame.
Bug when some towers were missing from the Evolutions screen.
Bug when lightning didn't deal damage to enemies.
Bug when the submerged submarine didn't inflict the promised effects.
Bug when towers targeted enemies in the wrong order.
Responsivity issues in the tutorial on different screen resolutions.
Bug when the ground was still shaking even after selling the earthquake tower.
Bug when in tutorial, the "Tower Info Panel" was sometimes hidden.
The fighter tower was levitating when placed on the red zone of another tower.
Updated descriptions of some towers to be more understandable and relevant.
Bug when muzzle animation wasn't displayed in the machine gun mounted on a heavy tank tower.
Bug when the earthquake tower would stop after evolution.
Bug when the HP of the base wasn't saved.
Bug when the sequence of enemies wasn't saved.
Bug when you couldn't place a tower on spots where you should be able to place it.
Bug when some towers didn't earn any XP.
Bug with an enormous trench red zone.
Bug when the red zones of a collector didn't block other towers.
Bug with missing textures of the range and red zones of some towers.
Changed "Cataclysm" to "Pollution" everywhere where it was missed ("Cataclysm Collector" name remains untouched).
Other quality of life improvements.