Yes, this issue may occur in device which may not handle URP. My older device which was non working side with v.0.2.1 runs it with few frame drops. All the older contents will be added with introduction of respective enemy in a level.
Working alone does having it perks, like I can easily understand what's wrong, no overpromising since I know my limits.
But there are lot of fun stuffs that were not planned before and were suggested by others.