Congratulations on the new development, mate! It reminds me, essentially, of Sabre Wulf. It controls very smoothly, and I can see how difficult it's going to be to find the keys. Hugs!
Thank you! Yeah it was definitely inspired by it; Sabre Wulf was the 2nd game I played on the Spectrum BITD ... there were more bits I wanted to implement, but ran short of memory for it. Regarding the keys - their location changes every game (16 possible screens they can be in). Good luck!