In the end, I got 2 lines in bastet and 3 lines in hatetris :)
Also, it's possible to finish a line using one piece (multiple lines actually).
I managed to pull off a 4-line score: 20C2 AAAA AAAA 8CAA AAAA AAAA AEAA AAAA A5EA AAAA AD5A A2AA 0000 AA32 0AAA AAAA B0A9 552A AAAA ADAA AAAA B62A AAAA AB2A AAAA A8C2 AAAA AAA3 2AAA AAAA D58A AAAD AAAA A8C0 2AAA A8C2 2AAA AA39 AAAA B0AA AAAA 3AAA A8C8 AAAA A36A A3AA A32A AA30 02AA 8C0A AA8C 2AA9 5DAA AAAA AA9D 55AA AAAA AA75 5AAA AAA9 55AA AAAA 15AA AAA9 D54A AAAB 9AAA 46AA A808 AAA0 AAA1 556A AAB5 55AA AAAA
C00A AAAA AAAB 0AAA AAAA ABAA AAAA AAB5 AAAA AAAA B000 AAAA AAAD 52AA AAAA AC02 AAAA AAAC 0AAA AAAA C2AA AAAA ACAA AAAA AEAA AAAA ADAA AAAA AD6A AAAA C00A AAAA C02A AAAA C0AA AAAC 2AAA AACA AAAA EAAA AAD4 AAAA AC00 AAAC 02AA AC0A AAC2 AAAC AAAD 2AAA D55A AAAA AAA9 5DAA AAAA AB5A AAAB 5AAA B00A AB0A ABAA 9D4A A975 AAAA AAB5 56AA AAAC 02AA C2AA EAAD 52AA D56A AAAD 55AA A956 AAB5 AAB1 AAB0 AA8C 1756 6A01 03AA 2A
But I did manage one line on my second attempt :)